By the time he realizes he _____ a mistake, it’ll be too late for him to change his mind.    
A．makesB．madeC．has madeD．had made
C
考察時態(tài)。By與完成時連用，且by the time引導是時間狀語從句，，使用一般現(xiàn)在時表示將來時，主句使用將來時。根據(jù)句意可知是他認識到自己已經(jīng)犯了錯誤。
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：單選題

She         down beside me and soon got into sleep.
A．liedB．laidC．layD．lain

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

A local radio station said that several eruptions _____ in the past twenty years.
A．had been taken placeB．took place
C．have taken placeD．had taken place

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

This coastal area        a national wildlife reserve last year.
A．names B．namedC．is namedD．was named

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—Waiter, what about my coffee? I______ for over 10 minutes.
—Sorry, sir. It will just be a moment
A．a(chǎn)m waitingB．was waitingC．had waitedD．have been waiting

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Our food supply _____. We’d better get some in case there’s ____ left.
A．is running out, noneB．has run out of, none
C．is using up, nothingD．has used up, nothing

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

---Will you please repeat your idea?
---Sure. But I don’t think that you ________ attention.
A．paidB．pay C．a(chǎn)re payingD．were paying

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

– Will you please go to see the movie Guanyinshan with me?
– No, I won’t. I           it already.
A. saw                 B. have seen               C. see

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

His mother looked very tired，for she _____ the house herself all day.
A．had cleanedB．has been cleaningC．had been cleaningD．has cleaned

查看答案和解析>>

同步練習冊答案