Both his parents look sad. Maybe they _ what"s happened to him.

题型：同步题难度：来源：

Both his parents look sad.  Maybe they      _   what"s happened to him.             [     ]
A. knew
B. had known
C. have known
D. will know

答案

举一反三

By the time he showed up, we _     _ twenty trees.          [     ]
A. has planted
B. have planted
C. had planted
D. were planting

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句型转换。1. Jack has gone to school ．(用by the time 改写句子)
   Jack________  ________  to school by the time I called him.
2. The story was very interesting. I could never forget it ．   (合并为一句)
   The story was________ ________ ________ I could never forget it.
3. I was late for school because my alarm clock didn"t go off. (就画线部分提问)
    ________ ________ you late for school?
4. I wonder if he can marry me. (改为同义句)
   I ________ ________ ________if he can get________ ________ me.
5. He always be careful so that he will not make mistakes. (改为同义句)
    He always be careful ________ ________ ________  to make mistakes.
6. Could I borrow your bike? (改为同义句)
    Could you________ your bike________ me?
7. When I got up, my father had gone into the bathroom.  (改为同义句)
    ________ ________ ________ I got up, my father had gone into the bathroom.
8. The little boy is very polite. (改为同义句)
   The little boy has________ ________.
9. Something was wrong with my car on my way home yesterday.  (改为同义句)
    My car ________ ________on my way home yesterday.
10. My French has improved quickly. (改为感叹句)
    ________ ________ my French has improved!

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—Did you see Mary at the party?
—No, she _____ by the time I got there.      [     ]
A.  would leave
B.  has left
C.  had left
D.  was leaving

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Where I got to the cinema, the film _____ for fifteen minutes．[     ]
A. had begun
B. has begun
C. has been on
D. had been on

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By the time I got home, my son _______ his homework already.          [     ]
A. finished
B. have finished
C. had finished
D. will finish

题型：期末题难度：| 查看答案