1.Let me tell you something about the activity．
2.I'm glad to have received your letter of Apr．9th．I'm pleased to hear that you're coming to China for a visit．
3.I'm writing to thank you for your help during my stay in America．
4.And I would like to write a letter to tell you that…
2.I'm looking forward to your reply at your earliest convenience.
3.I'd appreciate it if you could reply earlier．
Ladies and gentlemen, May I have your attention, please? I have an announcement to make．
All the teachers and students are required to attend it．Please take your notebooks and make notes．Please listen carefully and we'll have a discussion in groups．Please come on time and don’t be late．
Please come and join in it．Everybody is welcome to attend it．I hope you’ll have a nice time here．That’s all．Thank you．
first of all,to begin with,in my opinion,according to,so far,as far as等.
first,at first,then,later,in the end,finally,afterwards,after that,since then,for the first time,at last,as soon as,the next moment,meanwhile,later on,soon,finally等.
on the right/left,to the right/left of,on one side of…on the other side of…,at the foot/top/end of,in the middle/centre of,next to,far from,in front of等.
for,because of,one reason is that…another reason is that…,thus,so,as a result(of)等.
but,yet,however,after all,in fact,while,on the contrary,instead of,unlike,although,otherwise,nevertheless,in spite of,after all等.
for example,such as,that is,like,as follows,in other words,and so on等.
what’s more,on one hand…on the other hand…,in addition to,as well,still,also,in other words,not only…but also…,besides,furthermore,moreover等.
in short,in a word,in general,in brief,in all,on the whole等。