Questions

1.

2.

3.

4.

5.

6.

7.

8.

б)

–

–

–

+

–

+

+

–

а)

–

+

+

–

–

+

–

–

в)

+

–

–

–

+

+

–

+

1 (+) 2, 4, 5, 6, 7, 9, 11

2 (–) 1, 3, 8, 10, 12

(+) 1, 5, 6, 7, 9, 10, 11

(–) 2, 3, 4, 8, 12

1. This discussion is very useful. 2. He is not unskillfull. 3. It was a successful attempt. 4. It is not useless to make experiments. 5. He is a very skillful chemist. 6. It is harmful to drink much coffee. 7. You must be very careful with this gas. 8. Slow heating destroys harmful organisms.

1. This is a very powerful engine. 2. Oxygen is a colourless gas. 3. The operation was very painful. 4. His answer was quite unsuccessful. 5. This work is not useless. 6. The results of his work were very useful. 7. The number of elements is not limitless. 8. He is a very helpful man.

Speaker

1) careless

2) harmful

3) useful

4) skillful

5) helpless

6) painless

7) tasteful

8) meaningless

1) –

2) –

3) +

4) +

5) –

6) +

7) +

8) –

1. –

2. –

3. +

4. +

5. +

6. –

7. +

8. –

9. +

10. –

11. +

12. –

13. –

14. –

15. +

16. +

1. colouless, 2. faultless, 3. airless, 4. powerful, 5. careful, harmful, 6. starless, 7. harmful, 8. useless

2, 5, 6, 7, 10, 12

Speaker

1) quite useless – absolutely useless 1) +

2) not very harmless – harmful 2) +

3) absolutely doubtless – doubtful 3) –

4) quite unlimited – limitless 4) +

5) not very skillful – quite skillful 5) –

6) rather meaningless – not very meaningful 6) +

7) absolutely tactless – tactful 7) –

8) quite helpless – helpful 8) –

9) not quite uneventful – eventless 9) –

10) distasteful – very tasty 10) –

1. The author means it is harmful. 2. The author means they are doubtful. 3. The author means it will be painful. 4. The author means it was fruitless. 5. The author means he is skillful. 6. The author means it was unsuccessful. 7. The author means they were tactless.

1. Oh, no, half a century ago operations were more painful than now. 2. + 3. Oh, no, bananas are tasteful. 4. Oh, no, freezing is harmless for meat products. 5. + 6. Oh, no, drinking water is tasteless. 7. Oh, no, phosphorus is a harmful substance.

A – 3, B – 1, C – 2, D – 3, E – 1, F – 1, G – 2

1) water, 2) sugar, 3) wood and grain gases, 4) the inert gases, 5) butter-milk, 6) bacteria

1 – 2, 2 – 1, 3 – 1, 4 – 1, 5 – 2, 6 – 2