In the last twenty years, seven Canadian scientists the Nobel prize!
A. won
B. had won
C. was winning
D. have won
网友回答
A. won
B. had won
C. was winning
(答案→)D. have won
解析：考查时态：句意：在过去的20年中，7个加拿大科学家获得了诺贝尔奖。时间状语是. In the last twenty years,一般和现在完成时连用，选D。