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——Now lots of teenagers spend a lot of time playing computer games.

——Yes. Teachers and their parents should prevent them ______________ too much.

A．to play

B．play

C．plays

D．playing

【答案】

【解析】

試題分析：prevent sb. (from )doing sth.表示“阻止某人做某事”，這是一個固定用法。本句的意思是“老師和家長應該阻止他們玩的太多。”所以本題選D。

考點：本題考查動詞。

點評：對于prevent的用法，應該熟練掌握，其用法與stop和keep的用法一樣，都表示“阻止某人做某事”。

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