A.shall stay | B.have stayed | C.will have stayed | D.have been staying |
A.read | B.had read | C.was reading | D.am reading |
A.have spent | B.was spending | C.spent | D.had been spending |
A.turning up | B.turning on | C.bringing up | D.bringing on |
A.was forgetting | B.forget | C.had forgotten | D.forgot |
A.done | B.doing | C.being done | D.had been done |
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