16. The construction of the two railway lines ________ by now.

　　A. has completed B. have completed

　　C. have been completed D. has been completed

　　[解析]the construction 作主语，谓语动词用单数。

　　[答案]D

　　17.The company had about 20 notebook computers but only one third ________ used regularly. Now we have 60 working all day long.

　　A. is B. are

　　C. was D. were

　　[解析]分数修饰复数名词作主语，谓语用复数。

　　[答案]D

　　18.Most of what has been said about the Smiths ________ also true of the Johnsons.

　　A. are B. is

　　C. being D. to be

　　[解析]most of what... 作主语，谓语动词用单数。

　　[答案]B

　　19. A poet and artist ________ coming to speak to us about Chinese literature and painting tomorrow afternoon.

　　A. is B. are

　　C. was D. were

　　[解析]两个名词共用一个冠词作主语，谓语动词用单数。

　　[答案]A

　　20.The father as well as his three children ________ skating on the frozen river every Sunday afternoon in winter.

　　A. is going B. go

　　C. goes D. are going

　　[解析]as well as 连接的主语，谓语动词采用就前一致原则。

　　[答案]C

　　21.Two hours away from the tall buildings of New York ________.

　　A. some of the world's largest bears live

　　B. lives some of the world's largest bears

　　C. do some of the world's largest bears live

　　D. live some of the world's largest bears

　　[解析]some of the world's largest bears 为句子真正的主语。

　　[答案]D

　　22.The library along with bookstores ________ reading materials. It's open from 9?00 a.m. to 4?00 p.m. on weekdays.

　　A. provides B. is providing

　　C. has provided D. provided

　　[解析]along with 作主语，谓语动词采用就前一致原则。

　　[答案]A

　　23.The number of people in the world ________ about 6 billion and large quantities of waste ________ each year.

　　A. total; has been produced B. totals; is produced

　　C. totals; are produced D. total; are being produced

　　[解析]the number of 作主语，谓语采用单数形式;quantities of 作主语，谓语采用复数形式。

　　[答案]C

　　24.Every possible means ________ to prevent the air pollution, but the sky is still not clear.

　　A. is used B. are used

　　C. has been used D. have been used

　　[解析]means 被 every 修饰，该处为单数形式，故谓语动词用单数。

　　[答案]C

　　25.It is reported that more than two ________ died in the accident.

　　A.hundred people B.hundreds people

　　C.hundred peoples D.hundreds peoples

　　[解析]有些考生认为 two 后面的名词应用复数，于是错选B、C或D。事实上，hundred 为数词，表示确切的数量时，用单数形式;当后面接介词 of 表示概数时用复数形式。people 意为“人们”时本身是复数概念，若加­s则意为“民族”。因此正确答案为A。

　　[答案]A

　　26.He spoke at the meeting and said that three years in high school ________ not long.

　　A.be B.are C.is D.been

　　[解析]有些考生认为从句的主语是“three years”，谓语动词应用复数形式，于是错选B。其实，表示时间、距离、温度等单位的名词往往被看做一个整体，其作主语时，谓语动词应用第三人称单数形式，故正确答案为C。

　　[答案]C

　　27.She collected ________ I did for the Hope Project the other day.

　　A.three times as many money as B.three times much money than

　　C.three times more money than D.three times many more money

　　[解析]有些考生可能会认为A项符合倍数的表达方法，从而错选A。事实上，money 为不可数名词，A、D项首先被排除;B、C中都出现了 than，形容词应用比较级，所以B项不对，故正确答案为C。

　　[答案]C

　　28.In our class, Bill is the only one of the students who ________ from America.

　　A.come B.comes

　　C.have come D.are

　　[解析]有些考生认为先行词是“students”，从句的谓语动词应用复数形式，从而将答案误选为A、C或D。事实上，当 one of 前面有 the very, the only, the best 等修饰语时，其后的定语从句的谓语动词的形式由 one 来决定，故正确答案为B。

　　[答案]B

　　29.Our headmaster and secretary of the Party branch ________ going to Beijing this evening.

　　A.be B.are

　　C.is D.will be

　　[解析]有些考生认为主语是“Our headmaster and secretary of the Party branch”，为两个人，谓语动词应用复数形式，因而错选B。其实，此处“secretary”前没有限定词，故此处主语是指一个人，谓语动词用单数形式，再根据句子结构可知此处用 is going to 表示“将要去”，故正确答案为C。

　　[答案]C

　　30.Each boy and each girl ________ to help the old man.

　　A.want B.is wanting

　　C.are wanting D.wants

　　[解析]“each+单数名词+and each+单数名词”作主语时谓语动词用单数形式。再根据语境可知此处应用一般现在时，故正确答案为D。句意：男孩、女孩都想帮助那位老人。

　　[答案]D