If we throw away too much waste and can’t keep good ecosystem,we _________ our f
题型：不详难度：来源：
If we throw away too much waste and can’t keep good ecosystem,we _________ our future.| A．must have destroyed | B．could be destroying | | C．may be destroying | D．must destroy |
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答案
| C |
解析
| must have destroyed表示对过去确有把握的推测。could be destroying表推测时常用于否定句和疑问句。may be destroying表示可能性,可能我们正在毁灭我们的未来。must destroy一定是,表示确有把握。从题意来看本题的最佳选项是C。 |
举一反三
.How I wish every family _________ a large house with a beautiful garden.| A．has | B．will have | C．had | D．had had |
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—Really?It _________ be a fire,most probably.| A．can | B．ought to | C．have to | D．must |
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