—Mike doesn"t look happy. What"s wrong with him?—It seems that he has some troub

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—Mike doesn"t look happy. What"s wrong with him?
—It seems that he has some trouble ______ that problem. [     ]
A. solve
B. solves
C. solving
D. to solve

答案

举一反三

Thanks for _____ care of my dog when I was away. [ ]
A. take
B. took
C. taking
D. takes

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—How can I learn more about computer science?
—You can learn by _____ questions. [ ]
A. asked
B. asking
C. be asked
D. ask

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What"s the matter, Miss Lin?
I am having trouble _____ out who has taken away my book on this desk.[ ]
A. find
B. to find
C. finding
D. found

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_____ some lettuce and green onion into the pancake makes it more delicious. [ ]
A. Put
B. Puts
C. Putting
D. To putting

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根据句意用所给词的正确形式填空。1. He thought carefully before _____ (reply).
2. The police are stopping cars and checking the drivers" _____ (license).
3. All the _____ (member) of the family get together to enjoy the holiday.
4. The children have never been _____ (teach) French.
5. He tried over and over and finally _____ (succeed).

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