We all know that we ________ our carbon footprint, but I suspect that many peop
题型：不详难度：来源：
We all know that we ________ our carbon footprint, but I suspect that many people wouldn"t be prepared to go as far as Joan Pick, a retired scientist living in south London.| A．must have reduced | B．should have reduced | | C．may have reduced | D．could have reduced |
|
答案
| B |
解析
| B 考察情态动词。句义：我们都知道本应该减少碳，但是我怀疑很少有人能够项Joan Pick一样。Must have done表示对过去情况的肯定推测。过去一定…；should have done本应该做某事，实际上却未做。May have done或许…；表示没有太大的把握，根据句义说明B正确。 |
举一反三
Brain, like muscles, also needs some kind of exercise and nutrition. The more you use your brain in the right direction, the more you ________ enhance your ability.| A．could | B．might | | C．shall | D．will |
|
—Mum, I"m tired.
—Well, if you ________ go to bed after midnight every night, what do you expect? |
A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.| A．may have been | B．must be | | C．need have been | D．might be |
|
—David is often absent from class.
—Tell him he ________ answer for it if he goes on behaving like that.| A．shall | B．might | | C．would | D．can |
|
Time ________ heal a broken heart. After five years, Steve seems to have got over the sorrow of losing his son.| A．should | B．would | | C．shall | D．can |
|
最新试题
热门考点