中文谷Iwrotetomyfriendonceaweek
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问题详情：
I wrote to my friend once a week____ I was too busy with my work.
A. it B. unless C. as D. when
【回答】
B
知识点：连词
题型：选择题
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问题详情：
I wrote to my friend once a week____ I was too busy with my work.
A. it B. unless C. as D. when
【回答】
B
知识点：连词
题型：选择题
