He is the man _________ you can turn when you are in trouble.

Can you tell me the name of the school ______ you visited last week?

I really don't know______ I had my money stolen .

The black teacher set a good example _____ all the rest of the group, ____  all peace-loving people.

Finally they arrived at a place ________ sold cigarettes and other small articles.

Choosing the right dictionary depends on ______ you want to use it for.

It never occurred to humans until the mid-l990s            some animals can be cloned.

Great changes have taken place in that school. It is no longer ______ it was 20 years ago, ____it was poorly equipped.

It is believed _______ he has gone to Shanghai. The problem is ________ we can’t get in touch with him.

Because of the financial crisis, days are gone ______ local 5-star hotels charged 6,000 yuan for one night.