the flight to Beijing will be delayed is I'm especially worried about．( )A．If, whatB．Whether, thatC．When, thatD．Whether, what 题目和参考答案——青夏教育精英家教网——

题目内容

1．____ the flight to Beijing will be delayed is ____ I'm especially worried about．（　　）

A．

If； what

B．

Whether； that

C．

When； that

D．

Whether； what

分析飞往北京的航班是否会延误是我特别担心的问题．

解答答案：D
题干中the flight to Beijing will be delayed是充当系动词的主语，是一个主语从句；I'm especially worried about是充当系动词的表语，是一个表语从句；表语从句中缺少宾语，要用连接代词；句意表达的是不确定的事，要用whether来引导，if不能连接主语从句．故选D．

点评在句子中起名词作用的各种从句统称为名词性从句．根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句．本题中what在宾语从句中起连接作用，同时又充当了从句的宾语．

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