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

試題分析：prevent sb. (from )doing sth.表示“阻止某人做某事”，這是一個固定用法。本句的意思是“老師和家長應該阻止他們玩的太多。”所以本題選D。
點評：對于prevent的用法，應該熟練掌握，其用法與stop和keep的用法一樣，都表示“阻止某人做某事”。