问题
单项选择题
Good harvest this year has made it possible for us to supply walnuts ______ last year's prices.
A．at
B．in
C．against
D．on
答案
参考答案：A
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Good harvest this year has made it possible for us to supply walnuts ______ last year's prices.
A．at
B．in
C．against
D．on
参考答案：A