I was about to leave the bell rang.A.butB.asC.whenD.while

Some scientists believe that is no doubt a cure fo...

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--Where shall we go to spend the weekend? --Nowher...

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-Flight 331 ．I’d better be on my way．Bye-bye． ...

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I failed in English a third time, I had no doubt a...

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-I don't think I know you. - [ ] A. No, you wouldn...

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