1)
1. Sequencing: in conclusion, firstly, to beging with, secondly, finely
2. Adding: moreover, furthermore, besides
3. GAO: it is true, I believe, in fact, personally
4. GAE: for instance, for example
5. SR: as a result
6. MAC: by contrast, whereas, unfortunately, on the other hand
7. SU: to sum up
2)
1. However...
2. Moreover, Besides this, Personally
3. First of all, I addition to this, As a result
4. as
5. As
4. 1)b 2)b 3)a 4)a