问题
选择题
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
A．what
B．which
C．where
D．who
答案
答案：A
考查名词性从句。What连接宾语从句从句they thought was an emergency exit door并作从句的主语。 句意当观众听到警报声他们跑向紧急出口处。