问题
选择题
I ate ________ sandwich while I was waiting for ________ 20:08 train.[ ]
A. the; a
B. the; the
C. a; the
D. a; a
答案
答案：C
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I ate ________ sandwich while I was waiting for ________ 20:08 train.[ ]
A. the; a
B. the; the
C. a; the
D. a; a
答案：C