题目内容
15.A public health campaign _____ the number of heart disease deaths by 80 percent over the past three decades.( )A. | had reduced | B. | had been reduced | ||
C. | has reduced | D. | has been reduced |
分析 经过了过去的三十年,一场公众健康运动使心脏病死亡病例减少了百分之八十.
解答 答案:C
题干中over the past three decades在过去的三十年,表达从过去到现在的时间,是现在完成时态的时间状语,要用现在完成时态;reduce减少,后面接了宾语,要用主动.故选C.
点评 现在完成时态是常用的基本时态之一.通常表达:从过去到现在的持续动作;过去的动作对现在的影响或结果.本题考查的是完成时态表示结果的用法.
练习册系列答案
相关题目
20.One advantage of owning your own car is you can go anywhere at any time you like.( )
A. | when | B. | why | C. | what | D. | that |
3.-Can I pay the bill by check?
---Sorry,sir.But it is the management rules of our hotel that payment ____ be made in cash.( )
---Sorry,sir.But it is the management rules of our hotel that payment ____ be made in cash.( )
A. | shall | B. | mustn't | C. | can't | D. | will |
10.In order to keep fit,the old man makes it a rule _____ for a walk after supper every day.( )
A. | going | B. | to go | C. | go | D. | gone |
20.Health experts believe that even a little exercise is far better than ______ at all.( )
A. | none | B. | little | C. | everything | D. | anything |
7.John_____have arrived yet. Otherwise he would have telephoned me.( )
A. | won't | B. | can't | C. | mustn't | D. | needn't |
4.I don't remember clearly ______ I came across the book I had been looking forword to in that old bookstore.( )
A. | when was it that | B. | that it was when | ||
C. | when it was that | D. | that when it was |
12.I ________ to visit you later that day,but I had to phone and cancel.( )
A. | come | B. | came | C. | am coming | D. | was coming |