【单选题】
We have kept（）our friendship by writing to each other, so we are true friends.
A、back
B、up
C、off
D、down
查看正确答案A、back B、up C、off D、down
搜题
更多“We have kept（）our friendship by writing to each other, so we are true friends.”相关的问题
第4题
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第8题
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第9题
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