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