分类：教育/科学-外语学习-英语考试
问题：选择正确的答案6Theplane_____not_____yet 
The plane_____not_____yet.A.has...tan off        B.hae...taken offC.is....taking off          D.will...take off
回答：The plane_____not_____yet.
A.has...taken off B.hae...taken off
C.is....taking off D.will...take off 

选择A。not yet表示还没有。飞机是单数名词，所以用第三人称完成式