题目内容
21、It is three years _____ my brother joined the army and it will be ten days ____ he comes back to see my parents.
A. when; after B. since; when C. before; until D. since; before
试题答案
21、D
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题目内容
21、It is three years _____ my brother joined the army and it will be ten days ____ he comes back to see my parents.
A. when; after B. since; when C. before; until D. since; before
试题答案
21、D