问题补充:
the flight to New York will be delayed is Im especially worried about.
A. If; what
B. Whether; that
C. When; that
D. Whether; what
答案:
A. If; what
B. Whether; that
C. When; that
(答案→)D. Whether; what
解析:考查主语从句和表语从句:句意:是否去纽约的航班要被推迟是我特别担心的,第一空填whether,连接主语从句,第二空填what,连接的是宾语从句,what在宾语从句中做宾语,选D.