摘要：--- Let’s go to play football, shall we? --- Sorry, I can’t. I must go over the points the teacher explained I forget them. A. after B. when C. before D. since
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--- Let’s go to play football, shall we?
--- Sorry, I can’t. I must go over the points the teacher explained ______ I forget them.
A. after B. when C. before D. since
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--- Let’s go to play football, shall we?
--- Sorry, I can’t. I must go over the points the teacher explained ______ I forget them
- A.after
- B.when
- C.before
- D.since