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, wter resources hve been severely wsted or polluted.Theyre scrceB．Scrce th, wter resources hve been severely wsted or polluted.Theyre scrce B．Scrce theyre C．Scrces theyre D．s scrce theyre

A．They are scarceB．Scarce they areC．Scarce as they areD．As scarce they are

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單項選擇題

recent report sys thtll se wter will hve been polluted by 2040.The; theB

．________ recent report sys thtll ________ se wter will hve been polluted by 2040.The; the B．The; 不填 C．; the D．; 不填A(yù)．The; theB．The; 不填C．A; theD．A; 不填

單項選擇題

If powerful mesures ______, thisre would hve been bdly polluted.ren’t tkenB．hveIf powerful

mesures ______, thisre would hve been bdly polluted.ren’t tken B．hven’t been tken C．weren’t tken D．hdn’t been tkenA．a(chǎn)ren’t takenB．haven’t been takenC．weren’t takenD．hadn’t been taken

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