1.  hearted

2. carelessly 

3 .disappointed 

4.  depth

5. skillful 

6.  celebrations 

7.  independenced

8. careful

9.  natural

10.  polluted 

`V`

1.  haven't finished 

2.  were written
3. spent 

4. watched

5. was surfing

6. have lived

7. burning 

8. don't save/will be

9.  solved

Q1. This coffee is too hot to drink. 

Q2. He drives so carelessly that he is sure to have an accident. 

Q3. His parents were disappointed that he failed the final examinations.

Q4. Do you know what the depth of river is ? 

Q5. He is a very skillful carpenter.

Q6. There are many celebrations in our country of a year.

Q7. We celebrate our independence Day on September 2nd.

Q8. You must be careful when you open that door.

Q9. We can save natural resources by using solar energy.

Q10. We can't clean up our polluted rivers and seas over night.

V)

Q1. I'm sorry. I haven't finished this work yet. 

Q2. Poems as well as play were written by William Shakespeare.

Q3. She is having an examination. She wishes she spent a day off on a farm now.

Q4. We hate watching the advertising program on TV.

Q5. I had a phone call while I was surfing the web.

Q6. They have lived in that house since it was rebuilt.

Q7. I suggest burning coal to heat the house.

Q8. If we don't save energy, there will be great shortage in the next century.

Q9. Do you have any difficulty in solving this problem.