大学英语每日一练（5-27）

21.Not until I began to work ________ how much time I had wasted.

A. didn’t I realize B. did I realize C. I didn’t realize D. I realized

21.【答案】B。【解析】考查倒装句。句意：直到我开始工作我才意识到我浪费了多少时间。not until位于句首，句子部分倒装，故排除C和D选项。而在not until位于句首时，是将not否定提前，故后面不需要再用not否定，排除A选项。故选B。

22.—She isn’t a dancing teacher, is she?

—________.

A. Yes, she isn’t B. No, she is C. Yes, she wasn’t D. No, but she was

22.【答案】D。【解析】考查反义疑问句回答。句意：“她不是一名舞蹈老师，对吗?”“是的，她不是。但她曾经是。”题干问句是反义疑问句，在回答反义疑问句时，仍然应使用 “Yes, she is./ No, she isn’t.”来进行回答，故可排除A, B, C三个选项。故选D。

23.________ a strange plant! I’ve never seen it before.

A. Which B. What C. How D. Whether

23.【答案】B。【解析】考查感叹句。句意：这种植物真奇怪!我以前从未见过。因为考感叹句首先排除A、D项。根据冠词在形容词前排除C。设空处修饰的中心词是名词应使用what进行感叹，故选B。

24.I have two ________ and three bottles of ________ here.

A. orange, orange B. oranges, oranges C. oranges, orange D. orange, oranges

24.【答案】C。【解析】考查名词单复数。句意：我有两个桔子和三瓶桔汁。桔子可数，桔汁不可数。故选C。

25.After watching ________ TV, she played ________ violin for an hour.

A.不填,不填 B. the, the C. the, 不填 D.不填, the

25.【答案】D。【解析】考查冠词。句意：在看完电视后她会练习一小时小提琴。watch TV 是习惯搭配，不必用冠词。表示乐器的名词前应用定冠词。故选D。

26.________ girls took part in the Happy Girl Competition but only few of them succeeded.

A. Million of B. Many millions of C. One million of D. Millions of

26.【答案】D。【解析】考查量词。句意：许多女孩参加‘快乐女生’的比赛，但是仅仅很少一些人成功了。million后面跟of的时候一定要用复数形式，表示“成千上万的，许多的”，排除A，C。many不能修饰million，排除B，故选D。

27.At our factory there are a few machines similar to ________ described in this magazine.

A. them B. these C. those D. ones

27.【答案】C。【解析】考查代词辨析。句意：我们厂里有几台机器与这本杂志上所描述的机器很像。those, ones替代同类异物可数名词复数，them替代同类同物，these没有这个用法。我们工厂的机器跟杂志上的不是同一批属于同类异物。排除A、B。those特指，ones泛指，这里特指杂志里的机器，故选C。

28.—I left my keys in the room yesterday. I had to get in ________ the window.

—It’s dangerous to do that.

A. in B. through C. over D. to

28.【答案】B。【解析】考查介词的用法。句意：我昨天把钥匙丢在房间了。我不得不爬窗户去拿钥匙。——这样太危险了。in意为“在……里面”;through意为“通过”;over意为“在……上面”;to意为“往”。根据句意，故选B。

29.Bob never does his homework ________ Mary. He makes lots of mistakes.

A. so careful as B. as carefully as C. carefully as D. as careful as

29.【答案】B。【解析】考查原级比较。句意：鲍勃不如玛丽做作业认真。他总是犯很多错误。因为该词修饰的是动词“做家庭作业”，所以要用副词，排除A、D。又根据as+adj/adv原级+as:和……一样;not+as+adj/adv原级+as:和……不一样/不如……排除C。根据结构，故选B。

30.She has set a new record; that is, the sales of her latest book ________ 50 million.

A. have reached B. has reached C. are reaching D. had reached

30.【答案】A。【解析】考查时态。句意：她破了新纪录，她的新书销售量达到了五千万。前句中的谓语has set是现在完成时，后一句的谓语动词也应用现在完成时，排除C和D;又因主语the sales是复数，排除。故选A。