Answer the following questions: -          Where are spaceships launched from?
-          What are manned and unmanned ships used for?
-          Do all the ships return to the Earth?
-          What signals do artificial satellites relay?
-          What purpose do they serve?
-          What are the functions of active satellites?
-          What makes it possible to carry out intercontinental transmission?

We always hear many students complain about having to study math or chemistry, even when they don't want to become a doctor or an engeneer. And it's possible to understand, it is actually true, the majority of the students won't even use math in the future. however, it is still important to study compulsory subjects. First of all, there are thousands of jobs that require knowing mathematics, even the final exam mark will matter to a college or the university you'll apply to. Actually, everyone uses math whether they realize it or not. In our everyday life we count in stores to find out how much something costs, and in the future things like that will stay important as well. Math helps us with other subjects, like physics and chemistry. A lot of math problems help the students to solve tasks in physics. 

We gave …a meal.
c) the visitors

I think I’ll buy these shoes. … really well.
a) they fit

My arms are aching now because … since two o’clock.
c) I’ve been swimming

What did you leave the meeting early … ? – I didn’t feel very well.
c) for

Cornwall is in … of England
b) the south-west

Cars and factories … the air.
c) pollute

Don’t throw that old paper in the bin. You should … it.
a) recycle

Pandas and whales are both … animals.
b) endangered

I work hard because I don’t want to … my exams.
c) fail

My sister got a … in English from Oxford University.
a) degree

I’ve lost the key. I ought … it in the safe place.
c) to put

We can’t go along here because the road is … .
b) being repaired

The driver was arrested for failing … an accident.
c) to report

My father is not only the town mayor, he runs … , too.
a) a business

Adrian takes no interest in clothes. He’ll wear … .
b) anything

All the guests were dancing. … having a good time.
b) everyone was

The government is doing nothing to help … .
b) the poors

I … missed the bus. I was only just in time to catch it.
c) nearly

The village is … Sheffield. It’s only six miles away.
c) near

My father used the money he won to set … his own company.
c) up