the flight to New York will be delayed is   （）     I＇m especially worried about.

题目解析 题目: The flight to New York will be delayed is （） I'm especially worried about. 选项：A. If; what B. Whether; that C. When; that D. Whether; what 答案: D 解析: 这是一个复合句，前面是主句"The flight to New York will be delayed"，后面是定语从句修饰"the flight"。正确答案是D，"whether"引导定语从句，并引出了从句中缺少的宾语"what"。