Section A
1、 have /has been in 呆了多久(用于完成时态2)
2、 the city has improved since I came he re a few years ago
3、 as a matter of fact =in fact
4、 see o neself 亲眼看见
Section B
1、 how do yo u like living here ?
2、 what do you think of living here ?
3、 come fo r a visit 来参观
once 一旦eg: once I work hard ,we will keep up with them.
when the sun rises , we will get up