--- Now lots of teenagers spend a lot of time playing computer games.
--- Yes. Teachers and their parents should prevent them ___________ too much.
A．to playB．playC．playsD．Playing
D

試題分析：句意：--現(xiàn)在許多年輕人花費(fèi)了許多時間打電腦游戲。--是的老師和他們的父母應(yīng)該組織他們玩太多。Prevent sb doing sth. 組織某人做某事。故選D.
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