вынесите за скобки общий множитель: а) 3а+6b б) 2x-8y в) 3m+12 г) 7n-14 - №9654199

вынесите за скобки общий множитель:
а) 3а+6b
б) 2x-8y
в) 3m+12
г) 7n-14
- Предмет:
  Алгебра
- Автор:
  judeblca
- 6 лет назад

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I. Find the word with the same or similar meaning.
Example: amazing – c)
a) frightening b) vital c) wonderful
1. to throw away
a) to recycle b) to get rid of c) to avoid
2. rubbish
a) trash b) packaging c) can
3. to protect
a) to prohibit b) to pack c) to save
4. vital (problems)
a) environmental b) crucial c) dangerous
5. to disappear
a) to die out b) to pollute c) to clean
II. Complete each sentence with one of the words or phrases below.
environment cut down causes pollution packaging environmental
dangerous save protect litter
1. You shouldn't use your car because it … noise and air pollution.
2. This notice can be seen at the zoo or at the circus to … people from danger.
3. He wants to become an ecologist himself to research and protect the … .
4. Recently, however, our beach has become more polluted with … left by tourists and locals.
5. Our forests are disappearing because they are … or burnt.
6. Your family can begin trying to … the Earth right now.
7. If you go the seaside, you'll see the … around you.
8. If people hadn't invented different machines and developed industry, the … problems wouldn't have appeared.
9. Why is litter so … in the countryside?
10. When you buy packed goods, don't drop the … .
III. The word in capitals above each of the following sentences can be used to form a word that fits suitably in the blank space. Fill each blank in this way.
Example: DANGER
It was a very dangerous trip.
1. PROTECT
If you want to be healthy, you should care about the … of the environment.
2. ECOLOGY
If we want to protect our environment, lots of things should be changed in our life, but first of all should improve … education.
3. CHEMISTRY
Sometimes fish die out in rivers because plants and factories throw … waste there.
4. COLLECT
People should be fined for dropping litter and rubbish … should be made more often along our beach.
5. RECYCLE
Very little of … material is actually recycled.
IV. Fill in the definite article the if needed.
1. … Nile flows to … Mediterranean Sea.
2. There are small islands in … Pacific Ocean.
3. … Hymalayas are the highest mountains in … Asia.
4. … Lake Baikal is the deepest lake in the world.
5. … Glasgow is one of the biggest cities in … United Kingdom.
6. … Red Sea is between … Africa and … Asia.
7. … Great Britain is situated in … British Isles.
V. Choose the correct translation of the sentences.
1. If he had worked hard, he would have achieved great progress.
a) Если он будет работать усердно, он добьется больших успехов.
b) Если бы он работал сейчас усердно, он добился бы больших успехов.
с) Если бы он работал тогда усердно, он добился бы больших успехов.
2. If I got this book, I would be happy.
a) Если у меня будет эта книга, я буду счастлив.
b) Если бы у меня была эта книга, я была бы счастлива.
с) Если бы у меня была тогда эта книга, я была бы счастлива.
3. If you had gone to the theatre last week, you would have enjoyed the evening.
a) Если бы ты сходил в театр на следующей неделе, ты получил бы удовольствие от вечера.
b) Если бы ты сходил в театр на прошлой неделе, ты получил бы удовольствие от вечера.
VI. Complete the sentences, using Conditional II and III.
Example: If we … (throw away) less rubbish, our planet would be nicer and cleaner. - If we threw away less rubbish, our planet would be nicer and cleaner.
1. If I (know) the result now, I would phone her immediately.
2. If I (be) you, I would stay at home.
3. If you (not miss) the train, you would have arrived in time.
4. If they had known it before, they (take) measures.
5. Your brother (become) much stronger if he took cold baths regularly.
6. If he were a first-class sportsman now, he (not train) enough last year.
7. If I (write) the composition yesterday, I would be free now.
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