问题
选择题
____ the flight to Beijing will be delayed is ____ I’m especially worried about.
A．If; what
B．Whether; that
C．When; that
D．Whether; what
答案
答案：D
考查主语从句和表语从句。句意:是否去北京的航班回推迟是我特别担忧的事。第二空缺宾语故用what。所以选D。
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