Question

——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

Answer 1

D

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。
点评：对于prevent的用法，应该熟练掌握，其用法与stop和keep的用法一样，都表示“阻止某人做某事”。