5.First of all,_______.

4.As is known to all,there are many ways________.

3.But_________.

2.It is true to the present situation that_________.

1.There has been a discussion recently about________.

12.In a word,_________.

问题解决型模板二

11.That is because________.

10.In fact,________.

9.Thirdly,_________.

8.Secondly,_________.