In the last twenty years, seven Canadian scientists _____ the Nobel prize!
A．wonB．had wonC．was winningD．have won
D

試題分析：考查時(shí)態(tài)：句意：在過去的20年中，7個(gè)加拿大科學(xué)家獲得了諾貝爾獎(jiǎng)。時(shí)間狀語是. In the last twenty years,一般和現(xiàn)在完成時(shí)連用，選D。
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