1.关于……人们有不同的观点。一些人认为……

There are different opinions among people as to ____ .Some people suggest that ____.

2.俗话说(常言道)……，它是我们前辈的经历，但是，即使在今天，它在许多场合仍然适用。

There is an old saying______.It“s the experience of our forefathers，however，it is correct in many cases even today.

3.现在，……，它们给我们的日常生活带来了许多危害。首先，……;其次，……更为糟糕的是……

Today, ____, which have brought a lot of harms in our daily life.First, ____ Second,____.What makes things worse is that______.