1.too……to 太……而不能 ；它太危险了以至于不能在海里面游泳
2.the one……the one 一个是……,另一个是……；我有两个研究项目,一个是小的,一个是大的
3.this is ……speaking 电话用语,我是谁；你好,我是Jim
4.be friendly to sb,对某人友好；我很擅长语法5.You should turn left at the third turning.6.The room was noisy last night.7.Did you enjoy yourselves ,boys?8.We should try our best to study English.9.I was taking a shower when you called me.10.I was doing my homeworkat this time yesterday.