问题
选择题
－Why did you arrive late?(成都市)
－The fog_______ our air flight for about half an hour.
A．held up
B．turned down
C．broke up
D．pulled down
答案
答案：A
考查短语辨析。held up 阻止，turned down调低，拒绝，broke up 分散，pulled down 拆毁，句意：你为什么到达晚了？大雾阻止了我们的航班大约半小时。所以选A。