A.should exist; masters | B.exist; controls | C.exists; masters | D.exists; controls |
A.cleaned | B.being cleaned | C.to clean | D.Cleaning |
A.needn’t hurry | B.don’t need to hurry |
C.must have hurried | D.needn’t have hurried |
A.have taken place | B.have been taken place |
C.have happened | D.have taken the place of |
A.will | B.am going to | C.can | D.am able to |
A.think went | B.think to have gone | C.thought went | D.thought had gone |
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