问题

For weeks, the street hasn’t been cleaned by the cleaners, _______makes it very dirty.
A:who
B:which
C:that
D:this
B:which
C:that
D:this
正确答案是:
同类题型
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The value of a leader is something to befelt and experienced. canit be put into words.
He ___ be in the garden.He must be in the room.‘
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