Question

That was because the school bus was _________ by a thick fog

1. A.
   broke off
2. B.
   held up
3. C.
   kept up
4. D.
   turned off

Answer 1

B
试题分析：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。