I enjoyed talking to the people with that I met at the party last night. 

Developing new technologies are time-consuming and expensive.

A novel is a story long enough to fill a complete book, in that the characters and events are usually imaginary.

The leader demanded from his members a serious attitude towards work, good team spirit, and that they work hard.

It is important that cancer is diagnosed and treated as early as possible in order to assure a successful cure. 

People in every part of the world readily and easily communicates by means of electronic mail.

The grass needs cutting, so let us have one of the men to take lawn-mower and do it.