问题

I was about to inform you of the sudden change ______an unexpected visitor came.

A:because
B:before
C:when
D:unless;

正确答案是：

同类题型

There appeared an _____ look on her face on hearing the _____ story.

you read, you’ll be.

We shouldn’t ignore what happens________it is difficultfor us to accept some stories.[ ]

Could my English be as good as yours , Judy——I think you should practice it as _____as you can.

Our teacher said sound___much more slowly than light.