Y. Gagarin lifted __________ into space aboard the Vostok 1__________ 9.07 a.m. Moscow time__________ 12^th April, 1961.

_______ general, I found zoology to be an easier subject than botany.

Contrary ......... what most people used to believed, these minerals are not renewable.

Mark Twain based the story ______his experience in the West.

What did Mr. Brown die ..........?

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

It was not a problem. We looked____________ his number in the telephone book.

Many of the stories are based______________ rumor.

He is very worried ......... his new job because he is not quite prepared .......... working.

Don't shout ___________ the child when he makes a mistake.

Someone left a box in the garden and I fell .......... it in the dark.

He aimed .......... the tiger.

He is a man .......... his forties.

Please put your stuff away to make room ______ the new computer.

Our study is very important____________ our future and useful_____________ our country.

Write your name ............ the top of the page.

I came on Monday at ten o'clock .......... the morning.

According ..... Bill, there's something wrong  ........ my computer.

We were all fascinated ________ the things we saw.

We have been learning English_____________ five years.

We are grateful (at/in/on/to) our teacher.