问题
选择题
They are broading the bridge to _____the flow of traffic.
A．put off
B．speed up
C．turn on
D．work out
答案
答案：B
题目分析：句意：今天早晨Mary逃脱了因迟到而应遭受的惩罚。escape from doing sth逃脱，from可以省略，当句子的escape动作执行者是该动词ing形式的动作承受者时用v-ing的被动式：being + 过去分词。故选C。
