Question

In the last twenty years, seven Canadian scientists _____ the Nobel prize!

A．won

B．had won

C．was winning

D．have won

Answer 1

D

试题分析：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。