A.has studied | B.studied | C.had studied | D.Studies |
A.Devoting | B.Being devoted | C.Having devoted | D.Devoted |
A.preserved | B.reserved | C.applied | D.Subscribed |
A.to collect | B.collected | C.being collected | D.Collecting |
A.examined | B.warned | C.forbidden | D.Defended |
A.to know | B.to be known | C.known | D.Knowing |
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