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

—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：句意；--现在很多的青少年花费大量的时间在打电脑游戏上。--是的。老师和他们的家长应该阻止他们玩太多的游戏。prevent sb (from) doing sth阻止某人做某事。故选D。考点：考查非谓语动词。

考点分析：

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