A.Walk | B.Having walked |
C.Walking | D.Walked |
A.to study | B.to be studied | C.to have studied | D.to be studying |
A.having been given | B.having given | C.having been giving | D.to have given |
A.would be | B.being | C.was | D.to be |
A.speaking; writing | B.spoken; written |
C.speaking; written | D.spoken; writing |
A.said to; to open | B.told ; opening |
C.asked; to open | D.said to ; please open |
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