问题

This is really ugly bird.—But it is useful bird. It can help fishermen catch fish.
A:an; a
B:an; an
C:a; a
D:a; an;
B:an; an
C:a; a
D:a; an;
正确答案是:
同类题型
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_Herry! National Day is coming…_ Just occupy yourself in your study