A.didn’t; must have been playing | B.didn’t; must be playing |
C.couldn’t; must have played | D.couldn’t; must be playing |
A.know | B.knows | C.is knowing | D.are knowing |
A.show; progress | B.shows; progress | C.show; progresses | D.shows; progresses |
A.is | B.are | C.have | D.Has |
A.is playing | B.have played | C.are playing | D.Hoped |
A.is used | B.are used | C.has been used | D.have been used |
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