Waste paper shouldn"t _____ everywhere. It"s our duty to keep our city clean.[

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Waste paper shouldn"t _____ everywhere. It"s our duty to keep our city clean.[     ]
A. be thrown
B. Throw
C. is thrown
D. are thrown

答案

举一反三

—Can you go to the movie with me tonight?
—Sorry, I can’t. I__________ study  for the coming exams.     [     ]
A. can
B. may
C. Would
D. have to

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You____eat____food if you want to keep slim. [ ]

A. should;little
B.must: little
C. should;less
D.should: more

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Dan_______come to the ceremony tomorrow. I"m not very sure.    [     ]
A. may
B. must
C. should
D. need

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—I have a fever.
—You _____ drink lots of water.[     ]
A. are
B. should
C. don"t
D. shouldn"t

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With the help of the new technology, you _____ e-mail your friends by mobile phone.      [     ]
A. can
B. must
C. need
D. should

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