改进题：The students were on tenterhooks before the examination began.
译文：考试开始后，学生们的心里七上八下。
改进的译文：考试开始之前，学生们的心里七上八下。
改进题：The students were on tenterhooks before the examination began.
译文：考试开始后，学生们的心里七上八下。
改进的译文：考试开始之前，学生们的心里七上八下。
