问题
选择题
The black hat is sale. You can buy one only two dollars.[ ]
A. in, at
B. on, for
C. for, with
D. at, on
答案
答案：B
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The black hat is sale. You can buy one only two dollars.[ ]
A. in, at
B. on, for
C. for, with
D. at, on
答案：B