_____ the flight to New York will be delayed is ____ I'm especially worried about.
A．If; whatB．Whether; thatC．When; thatD．Whether; what
D

試題分析：考查主語從句和表語從句：句意：是否去紐約的航班要被推遲是我特別擔心的，第一空填whether，連接主語從句，第二空填what，連接的是賓語從句，what在賓語從句中做賓語，選D.
點評：連接主語從句和表語從句的連接詞有：that, what, who, when, where, which, why, whether, how, whoever，whomever，whichever ，whatever等。解答這類題目，關(guān)鍵在于分析清楚句子結(jié)構(gòu)。通過判斷引導詞在從句中所作的成分及意義，來選擇正確的引導詞。
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