Newwaystopreventtheriver.A．hav

New ways _____ to prevent the river _____.

A．have found out, from polluting

B．have found, from being polluted

C．have been found out, from being polluted

D．have been found, from being polluted

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—Of course I did. As a matter of fact, I had such fun that time seemed to ___ so quickly.

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