题目内容

—The light in his office is still on. Do you know _______?

—To prepare for the material(材料) the meeting will need tomorrow, I think.

A. if he works hard B. why he stays up so late

C. why is he so busy D. when he will stop working

 

B

【解析】

试题分析：宾语从句的结构：主语+谓语+连接词+从句。从句在句中作宾语。从句要用陈述句的语序。如果主句是一般现在时，从句根据需要选择时态，如果主句是过去时态，从句要用相应的过去时态。但是从句是客观真理，一般用一般现在时态。根据回答我认为是为了准备明天开会的材料可知上句的意思是他的办公室的灯还亮着，你知道他为什么熬夜那么晚吗？故选B。

考点：考查宾语从句的用法。

 

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