Although many measures , the world’s economy is still going down.
A. are taken
B. were taken
C. will be taken
D. have been taken
网友回答
A. are taken
B. were taken
C. will be taken
(答案→)D. have been taken
解析：考查时态。根据句意可知：结构很多措施已经被采取，世界经济仍然在下滑。可知这里应该使用现在完成时的被动形式。