答案

1. 他们将面临的危险、回来寻找我们的机会、以及害怕再也无法知晓他们的命运和可能的耽搁，都是我们情绪低落、沮丧不已。

You should not let one failure discourage you.

My father is a lawyer, and he discouraged me from entering the field.

Learners can feel very discouraged if an exercise is too difficult.

The results were discouraging.

★ C

2. Life now fell into a regular pattern. 现在生活转入了常规。

The company holds regular meetings with employees. 定期的

His breathing was slow and regular. 有规律的，匀称的

Laura was one of his regular customers. 老顾客

He made a regular visit to his parents. 定期的，有规律的

3. We could also eat the remains when the fire died down.

die away 声音光线等渐渐减弱，甚至停止 die down渐弱，渐熄

die off有生命的群体逐一死去 die out 灭绝，绝种 The excitement soon died down. She waited until the footsteps had died away.

The wild population of koalas is in danger of dying out.

The flames finally died down.

4. Statistics should be treated with caution.

She always cautioned her boys against talking to strange men.

政府警告说工资上涨可能会导致失业率上升。

5. Our optimism and faith in Shackleton had helped us persevere in staying alive and he had repaid us by his commitment to return and save us from a slow but painful death.

In spite of all obstacles and failures, the scientist persevered with his experiments.

Despite a number of setbacks, they persevered in their attempts to fly around the world in a balloon.

They showed great perseverance in the face of difficulty.