Many measures___to stop the forest froom being cut down since the 1980s(take)
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Many measures___to stop the forest froom being cut down since the 1980s(take)
Many measures___to stop the forest froom being cut down since the 1980s(take)
Many measures___to stop the forest froom being cut down since the 1980s(take)
have been taken
与since搭配用完成时,措施被采取,用被动语态
have been taken .
since 是现在完成时的标志,所以时态应该为have done 的形式,在根据语意“从1980年以来,为阻止砍伐森林,采取了多项措施。”措施是被采取的,应该用被动语态,故为“have been taken ".