问题
选择题
They can buy the pens _____ a very good _____.
A．at, price
B．in, price
C．at, cost
D．at, selling
答案
答案：A
固定搭配，以…价格at a…price。
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They can buy the pens _____ a very good _____.
A．at, price
B．in, price
C．at, cost
D．at, selling
答案：A
固定搭配，以…价格at a…price。