1选择题
阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
Pandas are my favorite animals. They are cute and smart. They live in China and they eat bamboo every day. Tigers are strong, but I don't like them because they are kind of scary. Lions are lazy — they sleep for about twenty hours a day. My sister likes elephants best because they are friendly and very smart. She often asks me, "Why do you like pandas?" My answer is always the same: "Because they are cute."
Which of the following sentences is written correctly?
- A. Because the pandas are cute, so I like them.
- B. Because they are cute.
- C. I like pandas because they are cute.
- D. I like pandas because of they are cute.
答案：C
解析：本题考查 Why…? / Because… 句型的正确表达以及 because 的用法辨析。A 项错在 because 与 so 不能连用，英语中二者只能取其一；B 项是 Because 引导的从句，只能作答语，不能单独成句（本题要求选出完整正确的句子）；D 项错在 because of 后只能接名词、代词或动名词，不能接完整句子，应改为 because they are cute；C 项为主句 + because 从句的完整正确结构，语义与短文内容一致。另外提醒：because 在句首时首字母要大写，animal 复数要加 s。故选C。
2选择题
Read the sentences and choose the best answer to complete the dialogue.
A: What are your favorite animals?
B: I like penguins best.
A: ______ do you like them?
B: Because they are very cute and smart.
Which of the following words best completes the dialogue?
- A. What
- B. Why
- C. How
- D. Where
答案：B
解析：本题考查 Why 询问原因与 Because 回答原因的配对关系。空格后的答句是 Because they are very cute and smart，说明上句是在问原因，问原因要用 Why，故选 B。
易错点：
① 受中文“你喜欢它们怎么样”影响，误选 C. How。How 问方式或程度，不用于询问原因。
② 只看到 favorite animals 就误选 A. What，但 What 提问事物，与 Because 答句不搭配。
③ 误选 D. Where 问地点，与动物喜好无关。
牢记：Why 问原因，Because 答原因，两者必须配套使用。故选B。
3填空题
根据句意，用括号内所给词的适当形式填空。
1. My little brother ______ (have) a toy panda, and he plays with it every day.
2. Why ______ your sister ______ (like) elephants? — Because they are smart.
3. Because the lions are ______ (lazy), they sleep for many hours every day.
4. There are three ______ (tiger) in the zoo, and they are very strong.
5. We like koalas because they are ______ (friend) to people.
答案：1. has 2. does; like 3. lazy 4. tigers 5. friendly
解析：本题综合考查实义动词 have 的主谓一致、Why…? / Because… 句型、形容词与名词复数。第 1 句主语 My little brother 是第三人称单数，故用 has，易错为误填 have。第 2 句主语 your sister 为三单，在一般疑问句中需借助助动词 does 提前，其后动词还原为 like，易错为写成 Why does your sister likes… 或 Why your sister like…。第 3 句 are 后接形容词作表语，lazy 保持原形，不要写成 lazily。第 4 句 three 后名词必须用复数 tigers，注意 tiger 直接加 s。第 5 句 be 后用形容词 friendly（由 friend + ly 构成），易错为写成 friends。
4填空题
根据句意，用括号内所给词的适当形式填空（每空一词）。
1. —Why do you like ______ (panda)?
—Because they are very ______ (cute) and they eat bamboo.
2. This is not my pencil. ______ (I) is in my pencil box.
3. —______ your sister get to school by bike?
—No, she usually ______ (take) the subway.
4. Look! There ______ (be) two lions and a tiger in the zoo.
5. My brother can ______ (speak) English well, but he can't ______ (dance).
答案：1. pandas; cute
2. Mine
3. Does; takes
4. are
5. speak; dance
解析：本题综合考查本册四个易混考点：①动物名词复数与形容词表性质：panda 变复数加 -s；cute 为形容词，前面有 are，直接用原级，不加 -s。易错点：漏写 pandas 的 s；误把 cute 写成 cuter。②物主代词：空格后没有名词，必须用名词性物主代词 Mine（相当于 my pencil）；若写成 My 则后面必须接名词。易错点：写成 mine pencil。③一般现在时第三人称单数：主语 your sister 为第三人称单数，疑问句用 Does 开头，后面的动词还原为 get；答句主语 she 后谓语动词 take 变 takes。易错点：Does 后仍写 gets。④there be 就近原则：离 be 最近的名词是 two lions（复数），故用 are；若最近的是单数名词才用 is。易错点：受中文“有”影响写成 there have。⑤情态动词 can：can / can't 后一律接动词原形 speak、dance。易错点：写成 to speak 或 speaking。
5解答题
Read the sentences below and correct the mistakes. Each sentence has ONE mistake. Write the correct sentence in the blank.
1. Because they are lazy, so I don't like lions.
2. Why do you like panda?
3. —Would you like to go to the zoo with me? —Yes, I would like.
4. Because the monkeys are smart, I like it very much.
Now answer the following questions in English:
(1) Why do you like pandas? (Write one sentence with "Because ...".)
(2) Ask your partner a question about the animal he or she likes, using "Why do you like ...?"
答案：1. Because they are lazy, I don't like lions. (or: They are lazy, so I don't like lions.)
2. Why do you like pandas?
3. —Would you like to go to the zoo with me? —Yes, I'd love to.
4. Because the monkeys are smart, I like them very much.
(1) I like pandas because they are cute. (Any reasonable answer with "Because ..." is acceptable, e.g. Because pandas are cute and friendly, I like them.)
(2) Why do you like tigers / elephants / dogs ... ?
解析：本题考查 because 与 so 不能连用、动物名词复数、would like 的应答以及代词指代四个易混概念。第1句：because 与 so 都表示因果，英语中只能用其一，故删去 so（或把 Because 换成 They are）。第2句：panda 是可数名词，泛指一类动物要用复数 pandas，不能说 Why do you like panda?。第3句：Would you like to ...? 的肯定回答不能说 Yes, I would like，正确应答是 Yes, I'd love to. 或 Yes, I'd like to.。第4句：monkeys 是复数，代词必须用 them，不能用 it。易错点：①受中文“因为……所以……”影响，because 与 so 同时出现；②忘记名词复数加 s；③把汉语应答直译成 Yes, I would like；④单复数代词混用。第(1)(2)小问为开放输出，注意 Because 在句首要大写，Why do you like ...? 中 like 后接复数名词。
6解答题
Choose the correct word or expression to complete each sentence, and explain the reason in English or Chinese.
1. —______ do you like elephants? —Because they are smart. (A. What B. Why C. Where D. When)
2. I like dogs. They are very ______ to people. (A. lazy B. friendly C. scary D. boring)
3. Look! The panda ______ with its baby. (A. plays B. is playing C. play D. playing)
4. Tigers are strong, ______ I don't like them. (A. because B. so C. and D. or)
Then write two sentences of your own: one sentence telling which animal you like and why, and one imperative sentence (祈使句) giving advice about protecting animals.
答案：1. B (Why) — "Because" in the answer shows we are asking about a reason, so we use Why.
2. B (friendly) — Dogs are kind to people, so "friendly" fits.
3. B (is playing) — "Look!" tells us the action is happening now, so we use the present continuous: is playing.
4. B (so) — "Tigers are strong" is the reason and "I don't like them" is the result; we cannot use "because" and "so" together, and here the blank links reason to result, so "so" is correct.
Sample sentences: I like pandas because they are cute and smart. / Let's protect the animals. (or: Don't kill the animals.)
解析：本题以概念辨析为主，集中对比四组易混点。第1题：疑问词辨析——回答用 Because，说明问的是原因，应选 Why，而非 What/Where/When。第2题：动物特征形容词辨析——lazy（懒惰）、scary（吓人）、boring（无聊）都不符合“对人友好”的语境，应选 friendly。第3题：一般现在时与现在进行时的对比——Look! 是现在进行时的标志词，主语 The panda 为第三人称单数，结构为 is + doing，故选 is playing；若无 Look! 只表示习性则用 plays。第4题：because 与 so 的辨析——前因后果之间用 so 连接；注意 because 与 so 在同一句中不可并用。最后一问要求输出：①用 because 说明喜欢的动物及原因（注意 Because 在句首大写、动物名词用复数）；②写祈使句时，肯定用动词原形（Let's + 动词原形），否定用 Don't + 动词原形 或 Let's not + 动词原形。易错点：①看到“因为”就选 because，忽略句间的因果方向；②Look!、now 等标志词不敏感，误用一般现在时；③祈使句否定形式写成 Don't let's ...。
7解答题
Read the short passage below and answer the questions that follow.
My name is Li Ming. I love animals very much. My favorite animals are pandas because they are very cute. They live in China and they eat bamboo every day. My good friend Wang Lei likes elephants. He thinks they are smart and friendly. But he doesn't like lions because they are kind of scary. My little sister likes tigers best. She says tigers are strong and beautiful. However, she thinks koalas are too lazy to watch.
Questions:
(1) What are Li Ming's favorite animals? Why does he like them?
(2) Why doesn't Wang Lei like lions?
(3) 请用英语写两句话：先用 Why do you like ...? 的句型向你的同学提一个问题，再用 Because ... 给出你自己的回答。（注意：Because 在句首要大写；动物名称用复数时词尾要加 -s）
答案：(1) Li Ming's favorite animals are pandas. Because they are very cute.
(2) Because they are kind of scary.
(3) 示例：Why do you like elephants? Because they are smart and friendly.（答案不唯一，只要使用 Why do you like + 动物复数提问，并用 Because 引导的原因句回答即可。注意 Because 首字母大写，动物名词复数加 -s。）
解析：本题考查 Why do you like ...? 询问原因与 Because ... 回答原因这一核心句型，同时结合短文阅读。
(1) 从第一、二句 My favorite animals are pandas because they are very cute 可直接提取答案，注意回答要用完整句，且 pandas 为复数形式。
(2) 由 But he doesn't like lions because they are kind of scary 可知答案。易错点：误答为 He likes lions 或漏掉 because 引导的原因。
(3) 开放问答，重点考查两个易错点：① Because 在句首必须大写，写成 because 开头会被扣分；② 动物名词复数要加 -s，如 panda→pandas、elephant→elephants，不要写成 Why do you like panda?。还要注意 Why 问原因、Because 答原因，二者要配套，不能用 What 提问却用 Because 回答。
8解答题
阅读下面短文，按要求完成后面的题目。
Many children love animals, but they often make mistakes when they talk about them in English. Here are three sentences from students' homework. Let's look at them one by one.
(1) "Why do you like panda? Because they are lazy."
(2) "I like elephants. Because they are smart, they can draw pictures with their noses."
(3) "There have many kinds of animals in the zoo, and my sister has a pet cat at home."
任务一：找出上面三个句子中的错误，改正后写出正确的句子（每句只改一处）。
任务二：用完整的英语句子回答问题：Why do you like pandas?（请写出至少一个原因，句中须包含 because）
任务三：用一句话说明 Why 与 Because 在句子中的作用有什么不同。
答案：任务一：
(1) panda → pandas。正确句子：Why do you like pandas? Because they are lazy.
(2) Because → Because 前面改为完整句，或去掉句首 Because 改为 ...: they are smart, and they can draw pictures with their noses.（也可改为 I like elephants because they are smart.）
(3) There have → There are。正确句子：There are many kinds of animals in the zoo, and my sister has a pet cat at home.
任务二（示例）：I like pandas because they are very cute and friendly.
任务三（示例）：Why asks about the reason, and because gives the reason.（Why 用来提问原因，because 用来回答原因。）
解析：本题以“学生作业中的病句”为纯学科情境，重点考查 Why…? 与 Because… 的概念辨析及易混点。任务一：(1) 考查动物名词复数——panda 表示一类动物时应用复数 pandas，且前面没有 a/an；易错点：只写 panda，或改 Because 而不动 panda。(2) 考查 because 引导原因状语从句的句法：英语中 because 不能像中文“因为”那样单独起句并接一个并列分句，需改为“主句 + because + 原因从句”，或用 and 连接两个并列分句；易错点：只把句首 because 大写就认为改正完毕（题目要求改语法错误，不是改大小写）。(3) 考查 there be 与 have 的辨析：“某地存在某物”用 there be，遵循就近原则；“某人拥有某物”才用 have/has，主语是人。易错点：受中文“有”字影响写成 there have，或把后面的 has 也改成 is。任务二：要求句中含 because，答案不唯一，但必须是完整句，且 because 后接完整的原因（形容词 cute/friendly/smart 等），主句用 I like pandas（复数加 s）。易错点：写成 Because they are cute.（缺主句）或 I like pandas because they cute.（漏 be 动词）。任务三：考查概念辨析——Why 是疑问词，问原因；Because 是连词，答原因。答题要点是“问原因/答原因”的对应关系，用中文或英文作答均可，但必须说清二者功能不同。