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在线答疑、课后同类题练习、讲义下载、短信提醒3.or so It'll only cost 15 dollars or so.
There were twenty or so.
Our manager will be back in a month or so.
4.break up go away in different directions However, the bank broke up in about 1970, but reunited in the mid-1980s. The police tried to break up the crowd. The two friends broke up. Nearly three hours later, the meeting finally broke up.
5.by chance by accident I met my classmate in the street by chance. He got the money in the room by chance. I found my lost watch by chance yesterday.
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