In the booming city of Rio de Janeiro，a luxury hotel______trash into treasure for more than a decade，long before food waste was at the forefront of anyone’s mind。
2023-05-26
A.had been turning
B.has been turning
C.was turning
D.is turning
参考答案：A
B.has been turning
C.was turning
D.is turning
参考答案：A
本题考查动词的时态辨析。题目意为“在蓬勃发展的里约热内卢，一家豪华酒店已经把垃圾变成珍宝十多年了，早在食物浪费成为人们思想的最前沿之前。”A选项为过去完成时，表示动作发生在过去的过去；B选项为现在完成时，表示过去的动作持续到现在并且已经完成；C选项为过去进行时； D选项为现在进行时。根据题干后半句long before food waste was at the forefront of anyone’s mind可知，横线处的动作发生在过去的过去，因此需要用过去完成时。
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