The president announced his command that the whole nation be against terrorism．

He is not fit to command others that cannot command himself．

Successful men are those with a good command of modern technology．

The policeman gave the command for the car to stop．

English is spoken in many countries, such as Australia and Canada．

I like those students who are careful with their lessons, such as Mary, Lina．

The police are still uncertain of the murderer’s identity．

The Internet resources should be made full use of．

You must make good use of any opportunity to practise English．

Karl Marx made London the base for his revolutionary work．