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题目内容
（国家开放大学-开放英语4）
You did us a great favour by ____ that problem.
选择一项：
a.
dispose of
b.
disposing of
c.
dispose to
d.
disposing to
选择一项：
a.
dispose of
b.
disposing of
c.
dispose to
d.
disposing to
参考答案
