_________ the flight to New York will be delayed is _________ I’m especially worried aboutA.If; whatB.Whether; thatC.When; thatD.Whether; what
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D解析考查名词性从句。Whether引导主语从句whether the flight to New York will be delayed.意为：去纽约的航班是否被推迟；what引导表语从句what I’m especially worried about.并在句中做宾语。