题目

The reason______ he gave for being absent from school was ______ he had to attend his sick mother at home.   A. which; because    B. why; because    C.不填; that     D. why; that 答案：C 解析:  先行词为表原因的the reason, 且从句中的gave缺宾语, 所以第一空用关系代词that 或which用作gave的宾语, that 或which可以省略; 第二空是由that引导的表语从句, 即The reason …is/ was that…句式。

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