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1 . In my opinion, all Mr. Li ________ good to his students in his class at present. He is very strict with them in their studies.
A.does does does | B.does does do |
C.does do did | D.did do does |
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2010高一·全国·专题练习
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2 . An awful accident_____,however,occur the other day.
A.does | B.did | C.has to | D.had to |
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