With the help of high technology more and more new substances in the past 10 years.A. di

问题补充：

With the help of high technology, more and more new substances in the past 10 years.

A. discovered

B. have discovered

C. had been discovered

D. have been discovered

答案：

A. discovered

B. have discovered

C. had been discovered

(答案→)D. have been discovered

解析：考查时态。in the past+时间段，后用现在完成时态。句意：在先进技术的帮助下，在这十年间越来越多的新物质被发现。故选D。