1. Energy is （ ） makes things work.
A:what
B:something
C:anything
D:everything
答案:what
2.Because of the severe drought, the government has urged people to be （ ） of water.
A:thrifty
B:cautious
C:economic
D:economical
答案:economical
3. He kept looking at her, wondering whether he （ ） her somewhere.
A:sees
B:saw
C:had seen
D:has seen
答案:had seen
4. Yesterday he sold out all his stamps at （ ） he thought was a reasonable price.
A:which
B:as
C:what
D:that
答案:AI参考:正确选项是 C:what。\n\n在这个句子中，“what”作为宾语从句的连接词，引导一个宾语从句，并在从句中充当动词“sold”的宾语。句子的意思是“昨天他以他认为合理的一个价格卖掉了所有的邮票”。因此，选项C是正确答案。选项A、B和D在语法上都是正确的，但它们在句子中的作用与“what”不同。'
5.Careful （ ） should be given to issues of health and safety.
A:conservation
B:B.consideration
C:D.consistence
D:C.construction
答案:AI参考:正确答案是B：考虑。\n四个选项中只有B选项“考虑”与语境相符，而其他选项与语境不符。所以正确答案是B。因此，应给予健康和安全问题认真的考虑。'
6.Society is （ ）and bound to protect itself against a cult of violence.
A:endangered
B:entitled
C:engaged
D:titled
答案:AI参考:正确选项是【A】endangered。\n\n句子中提到“社会处于危险之中”，因此需要用形容词来描述社会所处的状态。选项A中的“endangered”意为“危险的”，符合句意。选项B、C、D的意思与句子不符。'
7. —What’s that terrible noise?
—The neighbors （ ） for a party.
A:are preparing
B:have prepared
C:prepare
D:will prepare
答案:AI参考:正确选项是【A:are preparing 】。\n\n根据问题中的“What’s that terrible noise?”和回答中的“The neighbors are preparing for a party”，可以确定邻居正在为聚会做准备，因此应该使用现在进行时的被动语态，即are preparing。选项B、C、D都不符合语法规则。'
8. She has set a new record, that is, the sales of her latest book （ ） 50 million.
A:are reaching
B:have reached
C:had reached
D:has reached
答案:AI参考:正确选项是 D:has reached。\n\n句子中的时间状语是“that is”，它后面的内容是解释前面的内容，说明前面提到的内容是什么。在这个句子中，“the sales of her latest book have reached 50 million”是一个新的信息点，表示“她的新书的销售额已经达到了5000万”。根据这个时间状语，需要用现在完成时，因此选项D是正确的。而选项A、B和C都不符合语法规则。'
9.It is absolutely （ ） that we deal with this emergency by tomorrow. .
A:C.imperative
B:comparative
C:B.impressive
D:D.operative
答案:AI参考:正确答案是A.C. imperative。\n这道题考查形容词辨析，根据句意“我们必须在明天之前处理这个紧急情况”可知，使用“A. imperative 紧急的”更符合语境。因此，正确答案是C。B. impressive 令人印象深刻的；D. operative 有效的，都不能很好地表达出题干中急迫的含义。所以，A选项为正确答案。'
10. —Has Sam finished his homework today?
—I have no idea. He （ ） it this morning.
A:had done
B:has done
C:did
D:was doing
答案:AI参考:正确选项是【B:has done】。\n\n根据问题中的时间状语today和选项中的时态，可以确定答案为现在完成时。而根据上下文，问题询问的是Sam今天是否完成了作业，因此选项B符合语境。其他选项中，had done表示过去完成时，与现在时态不符；did表示一般过去时，也与问题语境不符；was doing表示过去进行时，更适用于描述过去某个时间点正在进行的动作，也不符合问题语境。因此，正确答案是B。'
11. She （ ） her hairstyle in her hometown before she came to Chongqing for a better job.
A:was changing
B:changed
C:would change
D:has changed
A:assess B:judge C:evaluate D:validate 13. Let’s keep to the point or we （ ） any decisions.
A:never reach B:will never reach C:have never reached D:never reached 14.The birth of a star is a （ ）, slow event; all but a very few of the stars visible to the naked eye have existed longer than mankind.
A:scarce B:least C:seldom D:rare 15. I （ ） while reading the English textbook. Luckily, my roommate woke me up in time!
A:fall asleep B:had fallen asleep C:fell asleep D:have fallen asleep 16.Our school is no longer （ ） it was 10 years ago, （） it was not well equipped.
A:that; which B:what; which C:what; when D:that; where 17.（ ） by the government, these children who are caught up in the war were suffering.
A:B.Overlook B:Overlooked C:C.Overlooking D:D.Having overlooked 18. We wrote a letter of thanks to （ ） had helped us.
A:those B:who C:whom D:whoever 19. Why don ’ t you bring （ ） to his attention that you are too busy to do it.
A:this B:that C:it D:what 20. —You were out when I dropped in at your house.
—Oh, I （ ） for a friend from England at the airport.
A:had waited B:am waiting C:has waited D:was waiting 21. The first use of atomic weapons was in 1945, and their power （ ） increased enormously ever since.
A:has been B:was C:is D:had been 22. There’s been（ ） response to the UN Secretary-General’s recent peace efforts.
A:positive B:optimistic C:right D:sure 23.He had a good memory, and total （ ） of her spoken words.
A:reminder B:remember C:recall D:impression 24. Thinking that you know （ ） in fact you don’ t is a serious mistake.
A:what B:when C:however D:that 25. Although he has lived with us for years, he （ ） us much impression.
A:hasn’t left B:hadn’t left C:didn’t leave D:doesn’t leave 26.Please （ ） the main points of the text in three sentences.
A:summary up B:sum up C:sum it up D:sum them up 27. Do you think the reason （ ） he gave is believable?
A:why B:which C:for which D:what
