A.to be involved | B.to involve |
C.to have involved | D.to have been involved |
A.to help | B.in helping | C.on helping | D.to helping |
A.to happen | B.to be happened | C.to have happened | D.to have been happened |
A.to mail | B.mailed | C.mailing | D.mail |
A.waiting | B.wait | C.to wait | D.waited |
A.persuaded | B.impressed | C.pressed | D.inspired |
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