题目
Nobody knows ______ yesterday.
A.
how the accident happened
B.
how does the accident happen
C.
how the accident happens
D.
how did the accident happen
知识点：连接代词章节：词法 / 代词
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Nobody knows ______ yesterday.
答案与解析
自由组卷
围绕这道题再组一份练习 →
完整试卷
浏览同年级试卷结构 →