31. It’s time for…/to do sth.
春天到了，该种树了。
Spring has come, it’s time to plant trees.
是我们听英语节目的时间了
It’s time for us to listen to English programme.
该上学了。
It’s time to go to school./ It’s time for school.
32. It’s two meters (years) long (high, old).
这个游泳池长50m,宽20m，深2.5m。
The swimming pool is 50 metros long, 20 meters wide, two and a half meters deep.
河里的冰有几百米厚。
The ice in the river is several hundred thick.
中国的历史有几千年那么久远。
For Chinese history, it’s about thousands of years.
33. keep sb. doing
很抱歉让你在这儿等这么长时间。
I’m sorry to keep you waiting for such a long time.
那个军官让士兵们在太阳下站一个小时。
The officer kept the soldiers standing in the sun for an hour.
34. keep/make sth. +adj.
在图书馆请保持安静。
Please keep the library quiet.
这条消息使他们很难过
This piece of news made them very sad.
不要乱丢垃圾，请保持地面清洁。
No littering, keep the floor clean.
35. like to do / like doing
小孩喜欢跨过草坪玩儿，李老师常阻止他们这样做。
Children like stepping into the grass to play, Mr. Li often stops them from doing that.
我喜欢听轻音乐。
I enjoy listening to the light music.
我喜欢在闲暇时做些东西来丰富（enrich）我的生活。
I like to make something in my spare time to enrich my life.
36. make / let sb.(not) do sth.
别着急，让我替你照看林涛。
Don’t worry. Let me look after/ take care of Lin Tao for you.
那时，她妈妈让她每周六都站在电影院门口卖花。
At that time, her mother made her sell flowers in front of the cinema
他们让我们在雨中踢足球。
They make us play football in the rain.