题目内容
4.She is not certain about __________ she has done anything wrong.( )A. | if | B. | whether | C. | that | D. | what |
分析 她不确定她是否做错了事.
解答 答案:B.whether she has done anything wrong在句中充当宾语从句,而根据句意,此处需要"是否"之意的连词,可填if/whether,但因此处有about介词,故只能使用whether,故答案为B.
点评 本题考查介词的宾语从句和if/whether的区别.学生应对if/whether作"是否"时的用法区别多加练习.
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