the flight to New York will be delayed is I’m especially worried about.A. If; whatB. Wh

问题补充：

the flight to New York will be delayed is I’m 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：考查名词性从句。句中whether引导主语从句，句首不可用if，what引导表语从句，在从句中作宾语，选D。

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