281. ring up打电话
I'll ring you (up) this evening.
282. roll over翻滚
The bicycle hit me and rolled me over.
283. make room for给……腾出空地
The bus was extremely busy and we couldn't make any room for a single person.
284. round up集合
The courier rounded up the tourists and hurried them back into the coach.
285. run away逃避
Don't run away-I need your advice.
286. run out of消耗完，用完了
We're fast running out of beer.
287. be seated坐下
Please be seated and make yourself at home.
288. have a seat就坐
Would you have a seat and let's have a talk?
289. take a seat就坐
He came into the room, put off his coat, and took a seat at the desk.
290. see sb. off为某人送行
I am going to see my friends off at the airport, so I'll be late or a couple of minutes.
291. sell out卖光
All the reference¹ books for senior three have been sold out.
292. send for派人叫/请来
Mother is ill. Send for a doctor immediately.
293. send up发送（卫星）
An satellite has been sent up by China.
294. send out放射；发送；发出
The sun sends out light and warmth.
I've sent out a letter of invitation.
The trees send out new leaves in spring.
295. make sentences with用……造句
Could you make sentences with the phrase "put up"?
296. separate from把……与……分离
Separate the good apples from the bad ones.
297. set … on fire给……放火
The slaves set the houses of slave owners on fire.
298. set an example成为一个榜样
Lei Feng set a good example for several generations.
299. set fire to给……放火
The rebels² set fire to the houses of landlords³.
300. set off出发
They've set off on a journey round the world

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