The students were on tenterhooks before the examination began.

The students were on tenterhooks before the examination began.
A、考试开始前学生们紧张不安。
B、考试开始之前,学生们的心里七上八下。
C、考试开始后,学生们的心里七上八下。
D、考试开始后学生们紧张不安。
【正确答案】:B
【题目解析】:p120