I thought you might be tired, （） is why I decided to help you.

The Crimea hope to make money （）.

Nobody can work well if he is distracting.

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

Have run out of fuel, the plane crashed to the ground.

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

我們認(rèn)為節(jié)約用水非常重要。

Cars turn into dead weapons when they are driven carelessly.

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

It is quite typical of him to be late.