61.People cannot emphasize the importance of something too much.

　　62.On no account can we do something.

　　63.People should spare no effort to do something.

　　64.Something is closely related to something.

　　65.Something poses a great threat to something.

　　66.Most people are of the opinion that

　　67.Little evidence exists to support the claim.

　　68.One of the pressing problems facing us today is something.

　　69.Perhaps no issues are more controversial than something.

　　70.The problem of something has aroused public concern all over the world.

　　71.It is absolutely essential to do something.

　　72.The arrival of something will undoubtedly have a profound influence on our lives.

　　73.Along with something have come something.

　　74.Something is perfect example of something.

　　75.It is essential to examine every angle in order to fully understand the nature of a perplexing problem.

　　76.According to my personal experience,

　　77.In the age of something, plays an indispensable role.

　　78.In this light,

　　79.However, a closer examination will show this statement is misguided.

　　80.Not only… but also…