A.make use of | B.be made of |
C.be made use of | D.make of |
A.having been invented it | B.one of whom invented |
C.who had invented it | D.to have been invented |
A.comparing | B.compared | C.to compare | D.compares |
A.I am here | B.I was here | C.me to be here | D.my being here |
A.spotted; and thus | B.discovered; thus | C.founded; so | D.seen; thus |
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