单选题 It doesn't matter when or (41) a person sleeps, but everyone needs some rest to stay alive. That's (42) all doctors thought, until they heard about Al Herpin. People said he never (43) . Could this be true? The doctors decided to see this strange man (44) . Al Herpin was 90 years old when doctors went to his home. They (45) that he got some sleep of some kind. So they stayed with him and watched him. But they were (46) Though they watched him hour (47) hour and day after day, they never saw Herpin sleeping. In fact, he did not even have a bed. He never needed one. The only rest he got was (48) in a chair and reading newspapers. The doctors were puzzled (疑惑) by this strange sleeplessness. They asked him many questions, (49) to find an answer. They found only one answer that might (50) this. Herpin's mother was injured (受伤) several days before he was born. But that was all. Was that the real reason? Nobody could answer the question.

单选题 [A] how much [B] how many [C] how soon

【正确答案】 A

【答案解析】[解析] 此处表示“睡多长时间”，时间是不可数的，需用how much。how soon意为“多快”。

单选题 [A] that [B] what [C] how

【正确答案】 B

【答案解析】[解析] 这是典型的宾语从句，意为“这就是那些医生的想法”。这句话是由疑问句引出的宾语从句，用what做关系代词。

单选题 [A] sleep [B] slept [C] sleeping

【正确答案】 B

【答案解析】[解析] 本句意为“人们说他从不睡觉”。这是省略关系词that的宾语从句，从句应用一般过去时。

单选题 [A] him [B] herself [C] themselves

【正确答案】 C

【答案解析】[解析] 此处用反身代词themselves强调那些医生决定亲自去看那个奇怪的人。

单选题 [A] thought [B] think [C] thinking

【正确答案】 A

【答案解析】[解析] 全篇都是在过去发生的事，此处用一般过去时。

单选题 [A] surprise [B] surprising [C] surprised

【正确答案】 C

【答案解析】[解析] surprise表示“使…惊奇的”，surprising表示“(某物)令人惊奇的”，surprised表示“感到惊奇”。此句意为“医生们感到惊奇”。

单选题 [A] after [B] by [C] and

【正确答案】 A

【答案解析】[解析] hour after hour表示“一小时又一小时”，用法与后面紧随着的day after day用法相同。

单选题 [A] sat [B] to sit [C] sitting

【正确答案】 C

【答案解析】[解析] 此处用现在分词做主语，与后面的reading保持一致。

单选题 [A] hoped [B] hoping [C] hope

【正确答案】 B

【答案解析】[解析] 此处用动名词表伴随动作。

单选题 [A] explained [B] explaining [C] explain

【正确答案】 C

【答案解析】[解析] 情态动词(might)后跟动词原形。