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It is reported that very little use of these waste materials_______ in the past decades．
A．was takenB．was made
C．has been madeD．has been taken
C

試題分析：考查時態(tài)和語態(tài)。根據(jù)句中時間狀語in the past decades在過去的幾十年，可知用現(xiàn)在完成時，再根據(jù)主語是use，與make之間為被動關(guān)系。句意：據(jù)報道，這些廢材料在過去的幾十年里很少利用。故C正確。
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