答案：

1. Our circumstances are so desperate that it is uncertain whether we will ever return alive.

我们的处境让人绝望，谁也不清楚会不会活着回去。

in/ under no circumstances 绝不，任何情况下都不

in any circumstances 无论在什么情况下

in/ under the circumstances 在这种情况下 Under the circumstances, it seemed better not to tell him about the accident.

Under no circumstances should you lend Paul any money.

Don't open the door in any circumstances.

(2) B

2. Catherine wasn't sure the book was the right one, but she bought it anyhow.

Anyhow, why didn't you call the police?

Anyhow, I must be going now.

The cupboard would hardly close, with all the shoes thrown in anyhow.

Don't worry, we'll get the money back somehow.

Anyhow, let's leave that for the moment and look at this month's profit figures.

Maybe we could glue it together somehow or other.

Somehow, I just don't think it'll work.

4. His perseverance won our complete faith in him. He was always honest with us and never give way to disappointment.

She didn't speak a word to me all the way back home. 一路上；自始自终

What's the time, by the way?顺便问一下，顺便提一下

The artist recently arrived in Paris from Bulgaria by way of Vienna.经由

The storm gave way to bright sunshine.被.......替代

In a way it was one of our biggest mistakes.从某种意义上说

You'll have to move-you're in my way.挡路；挡道

Tropical forest is felled to make way for grassland.给......让路，腾出位置