题目内容：

The students, ______ at the way the questions were put, did not know the answers to them.
a、surprised
b、their being surprised
c、they being surprised
d、them surprised

优质解答

选A
当从句的形式主语和主句的主语一致时,主语和be动词可以省略.原句相当于:The students,who were suprised at the way the questions were put,did not know the answers to them.