题目内容
10.I don't know they have passed the exam.( )| A. | what | B. | if | C. | who | D. | which |
分析 我不知道他们是否已经通过考试.
解答 答案:B.考查连词辨析.句意"我不知道他们是否已经通过考试."what什么;if如果、是否;who谁;which哪一个.根据题干I don't know they have passed the exam.可知是if引导的宾语从句,if表示是否,即我不知道他们是否已经通过考试.故选B.
点评 理解各个选项的含义,分析句子的结构,根据具体内容作答.
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