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问题: Choose the correct article.

1.There is ___ coin on the floor. Is it ___ one we are looking for?

A.a, the
B.the, a
C.a, X
D.X, X
2.The crowd moved across the street and the policemen could do nothing to stop ___.
A.him
B.her
C.us
D.them

解答:

1.A
我们寻找的那个硬币,所以后面是特指the
2.D
crowd是复合名词,复数,所以是them