His parents don"t allow him ____. [ ]A. smoke B. to smoke C. smoking D. smok

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His parents don"t allow him ____. [ ]
A. smoke
B. to smoke
C. smoking
D. smokes

答案

举一反三

Kate is a little fat. Her mother advises her ____ clothes in dark colors. [ ]
A. wear
B. to wear
C. wearing
D. wears

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—What about going shopping together?
—Sorry, I have a lot of homework ____. [ ]
A. do
B. to do
C. doing
D. did

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It"s impossible for us ____ there on foot in two hours. [ ]
A. to get
B. get
C. getting
D. got

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—What did the teacher say just now?
—He asked them ____ the math problem. [ ]
A. discussing
B. discussed
C. to discuss
D. discuss

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I want ____ the answer to the problem. Could you help me? [ ]
A. to come up with
B. coming up with
C. come up with
D. came up with

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