问题
选择题
_____ alarm clock is 
on the desk. It's _____ red alarm clock.[ ]
A. An, an
B. A, a
C. An, a
D. A, an
答案
答案：C
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_____ alarm clock is on the desk. It's _____ red alarm clock.[ ]
A. An, an
B. A, a
C. An, a
D. A, an
答案：C