题目内容

Eighty percent of the students _________ from Japan.

A. comes
B. come
C. are coming
D. is coming

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We _________ for an hour when the bus finally came.

A. waited
B. have waiting
C. have been waiting
D. had been waiting

主视图和俯视图的投影规律是( )主视图和左视图的投影规律是( )左视图和俯视图的投影规律是( )

夕阳西下,

问世间,情为何物,

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