问题

What __________ unusual thing it is for me to find __________ UFO!
A:a; a
B:an; a
C:an; an
D:a; an;
B:an; a
C:an; an
D:a; an;
正确答案是:
同类题型
I tried more than once to persuade the taxi driver to slow down, but he just __________ listen.
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Hi, Jane! Can you go hiking with me on Sunday— . I have too much homework.
His speech made_____deep impression on theaudience that they could hardly forget it