——Now lots of teenagers spend a lot of t...

——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

D 【解析】试题分析：prevent sb. (from )doing sth.表示“阻止某人做某事”，这是一个固定用法。本句的意思是“老师和家长应该阻止他们玩的太多。”所以本题选D。考点：本题考查动词。

考点分析：

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