问题
选择题
_________ 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
答案：D
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。