问题
选择题
—Why do you prevent them______playing computer games?
---Because they have a bad______on teenagers.
A．from,effect
B．from,affect
C．to,effect
D．to,effect
答案
答案：A
题目分析：句意：你为什么阻止他们玩电脑游戏呢？因为他们对青少年有不良影响。Prevent sb from doing sth意为“阻止某人做某事”；have effort on sb意为“对某人有影响”；故选A。