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It is a long time ________ they separated, but it won’t be long ________ they meet again.
| A.since, before | B.after, when | C.since, when | D.after, before |
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It is a long time ________ they separated, but it won’t be long ________ they meet again.
| A.since, before | B.after, when | C.since, when | D.after, before |
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