The new staff didn＇t know how to use the system __________ I explained it to him yesterday.

It ________ snow tomorrow, but they will climb the mountain.

______ a river on land, an ocean current does not flow in a straight line.

_______ is known to the world, Mark Twain is a great American writer.

One rainy night, the policeman had a chance ________ with a gang of smugglers.

Anderson is one of those ________ appear friendly but in fact are hard to deal with.

There is no doubt ________ Herbert is the most industrious student in our class.

Look at the clock! It＇s time _________ work.

The representative of the company demanded that part of the agreement ________ revised.

I tried hard, but I couldn＇t find the______to the problem.

This company has two branches: one in Paris and _________ in New York.