首页 > 留学知识库

问题: They kept trying ________ they knew it was hopeless.

They kept trying__they knew it was hopeless.
A.when D.till
本题我选D,他们一直在努力,直到他们知道没有希望了.答案给的是A。 D怎么会是错的呢?

解答:

a
when 表转折。“虽然”
虽然他们知道这样是徒劳的,但他们还在尝试。

I had only fifteen dollars on me when the book I wanted cost twenty.
我身上只带了十五元钱,可是我想买的那本书定价二十元。
,但他们还在尝试。