Theplanewasthenabletorise.Thismeansit.A.couldriseB.mightriseC.mightsuceedinrisingD.rose这是《新概念英语》2第43课的练习.D但我觉得选：A

Question

The plane was then able to rise.This means it ____________ .
A.could rise B.might rise C.might suceed in rising D.rose
这是《新概念英语》2 第43课的练习.
D 但我觉得选：A

Answer 1

注意,be able to有下面的用法：
表示成功地做了某事时,只能用was/were able to, 不能用could.
He was able to flee Europe before the war broke out.
= He managed to flee Europe before the war broke out.
这样可以理解了吧