(2013·四川省都江堰市二模)—Mike, I can't find my watch anywhere. —You ________ it while working out.A.may have lost B.could have lostC.would have lost D.should have lost
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He stood up, _____the large door and looked outside. There ..
He stood up, _____the large door and looked outside. There on the ground lay a white dog. [ ]A. opens B. opened C. opening D. having opened