Nobody knows to work yesterday. A. why didn't he come B .why he didn't come C.why did he not come.

问题描述:

Nobody knows to work yesterday. A. why didn't he come B .why he didn't come C.why did he not come.
选哪个,都帮帮忙

答案B
解析: 从句都需要用陈述语序.
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