A.to be worn | B.to wear | C.to be wearing | D.being worn |
A.Opened | B.To be opened | C.Having opened | D.Opening |
A.held | B.being held | C.to hold | D.to be held |
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 |
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