2021年成人英语三级考前练习题（二十三）

“2021年成人英语三级考前练习题(二十三)”内容如下，来做题吧!

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2021年成人英语三级考前练习题（二十三）

2021年成人英语三级考前练习题汇总

1. ______ four years since John left school.

A. It was B. Those are C. It is D. They have been

2. By the time Juan gets home, his aunt _____ for Puerto Rico.

A. will leave B. leaves C. will have left D. left

3. “This is a terribly heavy box.”

“　_____　help you to carry it.”

A. I am to 　B. I will C. I D. I am going to

4.All the machines　_____by the end of the following week.

A. were repaired 　B. will be repaired C. have been repaired 　D will have been repaired

5.They believed that by using computers the production of their factory _____.

A.will greatly increase B.would greatly increase

C.has greatly increased D.would be greatly increased

6.No sooner had they got off train _______ it started moving .

A. when B. than C. then D. after

7.We can do nothing unless we _____ more information.

A. are given B. were to be given C. will be given D. were given

8.Most environmental problems exist because adequate measures for preventing them _____taken in the past.

A. was not B. were not C. were not being D. being not

9.The football match _____ in the afternoon.

A. has been held B. is being held C. is going to be held D. will hold

10.I’ll take down your name and address in case you _____ as a witness.

A. will need B.will be needed C. need D. are needed

参考答案及解析：

1.C 自从Johny离开学校有四年时间了。

2.C　将来完成时态。Leave for 离开一个地方到另一个地方去，By the time　信号词。

3.B　一般将来时态。 will 表示一种主观意愿。

4.D　将来完成时态。by the end of　到……时间为止，在此句中引导的时间状语从句为将来时间，所以是用将来时。答案B，D选取哪个?机器(machines)是被修的，所以用被动语态。显然，D为正确答案。

5.D 他们相信通过使用计算机，工厂的生产效率将会大大地提高。这是一个表示将来的被动语态，主句中believed为谓语动词，是过去式，故从句中的将来时态为过去将来时，答案范围缩为B，D。另外，工厂的生产(the production of their factory)是被提高的，所以为被动语态。由此，答案为D。

6.B “no sooner……than……”固定短语结构，意为 “ 一……就……”，常考内容。

7.A unless除非，information信息，我们什么都不能做除非被给予更多的信息，这句为一般现在时的被动语态。

8.B 被动语态的否定形式。environmental problems环境问题。

9.C is going to表示将来要怎么样，相当于will，其后面的动词同样用原形. 足球赛将在下午举行，足球赛是被举行的，所以用被动形式be held.

10.D take down记下;in case以防;witness目及者，见证人;address，住址。我将记下你的名字和住址，以备你作为一个见证人时用。一般现在时的被动语态。显示然答案为D。

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