望远镜10x50什么意思:#47.A washer is a machine () you wash or a person () washes.

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a./.../
b.with which...who
c.which...which
d.which...who
选什么,怎么分析的?

b
第一个空:with which,是因为先行词machine在从句中做with的宾语,即you wash with the machine.
第二个空:指人,用who

b