If we throw away too much waste and can’t keep good ecosystem,we _________ our future.
A．must have destroyedB．could be destroying ?
C．may be destroyingD．must destroy ?
C?
must have destroyed表示對過去確有把握的推測。could be destroying表推測時常用于否定句和疑問句。may be destroying表示可能性,可能我們正在毀滅我們的未來。must destroy一定是,表示確有把握。從題意來看本題的最佳選項(xiàng)是C。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題

—Where is my dictionary? I remember I put it here yesterday.
—You __________ it in the wrong place.
A．must putB．should have put
C．might putD．might have put

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

He       have come here yesterday,        he?
A．mustn’t;didB．couldn’t;hasC．mustn’t;haven’tD．must;didn’t

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.?
—Oh, dear! She _______ a lot of difficulties!
A．may go throughB．might go through?
C．ought to have gone throughD．must have gone through?

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The police have said that this situation _________ as soon as possible.?
A．must put an endB．should be put an end?
C．must be put an end toD．should put an end to

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—Did you visit the famous cultural relics last month?
—No,we _________ it,but we spent too much time shopping.?
A．could have visited
B．must have visited ?
C．can’t have visited
D．shouldn’t have visited ?

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

President Hu Jintao urged that every effort to_____rescue and treat the injured when the earthquake happened in Sichuan this year．
A．is madeB．must be madeC．should makeD．be made

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

I hadn’t expected__________James to apologize but I had hoped.?
A．him calling meB．that he would call me?
C．him to call meD．that he call me?

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The work ____ be finished in such a short time .
A．wasn''t able toB．couldn''tC．ought D．could

查看答案和解析>>

同步練習(xí)冊答案