24. pull through 恢复知觉或康复

She was so ill that it seemed unlikely that she would pull through. 她病得很厉害，看来不大可能康复了。

25. the mass of 大多数的(人)

The mass of workers do not want this strike. 大多数工人不愿举行这次罢工。

26. be a mass of sth. 充满;布满

The garden was a mass of colour. 花园里的景色五彩缤纷。

His face was a mass of bruises after the fight. 他打完架后脸上青一块紫一块的。

27. in the mass 总体上;总的来说

She says she doesn’t like children in the mass. 她说从总体上讲她不喜欢孩子。

28. cheer up 感到振奋;(使)高兴起来

The fans cheered up when they saw their favorite star. 看见自己喜欢的明星，“粉丝”们兴奋起来了。

Tom bought his girlfriend a large diamond ring to cheer her up. 为了哄女友高兴，汤姆给她买了一棵大钻戒。

29. cheer sb. on 为某人加油;鼓励

The crowd cheered the runners on as they started the last lap. 赛跑进入最后一圈时，观众为运动员加油鼓劲。

30. now that… 既然……

= since…Now that everyone is here, let’s discuss the problem. 既然大家都到了，让我们开会吧。

31. get the hang of (doing) sth. (口语)掌握(做)某事的窍门、要点

Have you got the hang of driving a car? 你掌握开车的窍门的了吗?

I don’t quite get the hang of his speech. 我不十分了解他讲话的要点。

32. break out (火灾、战争等)爆发

World War II broke out in 1939. 第二次世界大战是1939年爆发的。

33. come about 发生

(是不及物动词短语，无被动语态)How did it come about that you got lost? 你怎么会迷路了呢?

34. watch out (for…) 当心，提防

You’ll be cheated if you don’t watch out. 如果你不当心，就会上当受骗。

Watch out for cars when you cross the road. 过马路时要当心车辆。

35. 倍数的表达方法：

1)A is + 倍数 + as + adj./ adv. + as B

“A 是B的……倍”

2)A is + 倍数 + 比较级 + than B

“A比B……倍”

3)A is + 倍数 + the size (height, length, width等) + of B

“A 是B的……倍”

The population of China is about six times as large as that of the United States. 中国的人口大约是美国的6倍。

The jet fighter flies three times as fast as sound. 这架喷气式战斗机的飞行速度是音速的3倍。

This room is three times larger than that one. 这个房间比那个房间大3倍。

This room is three times the size of that one. 这个房间是那个房间的3倍大。

只要大家用心学习，认真复习，就有可能在高中的战场上考取自己理想的成绩。精品学习网的编辑为大家带来的高中高一英语必修知识点：Unit4总结，希望能为大家提供帮助。