A.offering | B.to offer | C.to be offered | D.offered |
A.seen | B.to be seen | C.seeing | D.to see |
A.to do | B.to be doing | C.to have done | D.having done |
A.Loading | B.Having loaded | C.Loaded | D.Being loaded |
A.to solve | B.solving | C.solve | D.being solved |
A.would come | B.would have come | C.came | D.had come |
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