1 The first thing to be mentioned is that
2 Another point to be considered is that
3 The last thing to be shown is that
4 The first advantage of (doing) something is that
5 Another advantage of (doing) something is that
6 The third advantage of (doing) something is that
7 The first disadvantage of (doing) something is that
8 Another disadvantage of (doing) something is that
9 The third disadvantage of (doing) something is that
10 The first possible reason is that
11 Another cause is that
12 The third element is that
13 The first measure to be taken is that
14 Another solution is that
15 The third step is that
16 That is why
17 Why…is that…
18 A hot topic discussed by people is whether
19 A is to B what C is to D
20 A is to B as C is to D
21 My view is that…