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Computersareusedinalmosteveryfieldnow,buttwentyyearsago...

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問題詳情:

Computersareusedinalmosteveryfieldnow,buttwentyyearsago...

Computers are used in almost every field now, but twenty years ago, no one ________ imagine that they were to become so popular and useful.

A. should  B. could  C. need  D. must

【回答】

B

知識點:情態動詞

題型:選擇題

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