——Now lots of teenagers spend a lot of time playing puter games.
——Yes. Teachers and their parents should prevent them too much.
A. to play
B. play
C. plays
D. playing
网友回答
A. to play
B. play
C. plays
(答案→)D. playing
解析：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。