A.when; at | B.because; in | C.if; for | D.though; at |
A.After | B.In | C.From | D.Since |
A.to have found | B.with finding | C.to find | D.in finding |
A.about | B.with | C.for | D.of |
A.to be polluted | B.from polluting | C.from being polluted | D.polluting |
A.The teacher as well as | B.Nobody but | C.The teacher besides | D.All except |
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