That singer has become very popular (at/with/to/of) the youth.

Endangered species are plant and animal species which are ________ danger of extinction.

No one knew precisely what would happen _____________ a human being in space.

He made himself pleasant .......... visitors.

I shall wait .......... you.

The dog ran .......... the house.

The Englishcontest organized___________ our teachers is an annual event in my school.

You should pay more attention __________ what your teacher explains.

I have not done my exercise .......... now.

Are you aware ________the time?

We had a lot of problem with our car. ........., we sold it and bought another one.

She was sad because he was rude ... her.

I saw Tom ............ a concert last Saturday.

Can you send it to me_______________ fax?

Mr. Johnson said he was ......... favor of doing the work right away.

We areall aware____________ the importance of the environment protection.

If you have ever watched television, you have seen plenty .......... drug advertisements.

......... the most part, his explanations are quite easy to understand.

We started our journey ______ foot.

Mozart died ________ Vienna in 1791 _________ the age of 35.

I was absent (at/in/to/from) class before yesterday.