Jeff goes to work _______and his wife go

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问题选择题

Jeff goes to work _______and his wife goes to work_______[ ]

A．by car; on her bike

B．by a car; on her bike

C．by car; by bikes

D．by his car; by her bike

答案

答案：A

选择题

We should try every way to develop education, it means slowing down in other fields.

A．in case

B．even if

C．only if

D．so that

单项选择题

下列各项有可能存在等位基因的是（）

A.四分体

B.一个双链DNA分子

C.果蝇的体细胞的线粒体中

D.非同源染色体