Man was, is and always will be trying to improve his living conditions.

Nobody can work well if he is distracting.

事實(shí)勝于雄辯。

No one should blind himself （） the well-known fact.

What effect has the Internet had on music piracy

There is nothing so admirable as a man whose sacrifices his life and happiness for others. 

Cars turn into dead weapons when they are driven carelessly.

It"s no good learning English without practice.

It is quite typical of him to be late.