That was because the school bus was _________ by a thick fog.
A．broke off
B．held up
C．kept up
D．turned off
B
题目分析：句意：那都是因为由于大雾校车被延误了。A. break off打断，终止C. keep up保持D. turn off 关掉电源等B. hold up 延误,阻挡，根据句意和动词短语的意思判断B最佳。
考点:考查动词短语的用法。
It is interesting to visit another country, there are some questions.When we don’t know the culture very , it may be difficult to talk the people there, we may not know how to do shopping. In a foreign country, we might（可能）not know where to eat or what to order in a restaurant.It is not easy to decide to tip（付小费）waiters or taxi drivers.When we help, we might not know how to ask for help.It is not happy to have an experience（经历） that. a short time, then we learn what to do and what to say.We learn life in country, and may be we don’t want
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