1、"It is evident that..."
2、"It is clear that..."
3、"There is no doubt that..."
4、"Some people argue that..."
5、"Others claim that..."
6、"In my opinion,"
7、"From my point of view,"
8、"I believe that..."
9、"It is my conviction that..."
10、"It stands to reason that..."
11、"Furthermore,..."
12、"Moreover,..."
13、"In addition,...".