1 care

2 sign

3 raise

4 encourage

5 participating

D C C B B A A D B D A B D C

c b a a b

3. A. resources     B. beaches    C. lakes   D.  oranges

4. A. notice             B. soccer          C. photo       D. grocery

5. A. character      B. school          C teacher          D. chemistry

6. A. tiger   B. wife            C. wisdom          D. Fire

7. A. named       B. lived        C. used         D. washed

4.b

5.d

6.c

1. was announced

2. were /have been arrested

3. is/was reported

4. was/had been stolen

5. is known

6. is said

7. were driven

8. is widely rumoured

9. are being held

10. are asked/are being asked

4.This bottle was broken by Peter. 

6.My mind can't be changed.

7.I hadn't been told about it.

8. Her telephone number isn't known by me. 

9. The children will be brought home by my students. 

10. A present was sent me last week. 

Ex 4.

1.Is English taught here?

2.Will she be invited to your wedding?

3.Has the work finished by Tom?

4.Were some exercised given by the teacher?

5.Has the window of the laboratory been changed ?

6.What books are being read this year?

7.How was the lost man found by the police?

8.who are you tooked after the children for?

9.How long has the doctor been waited for?

10.What time can their papers be handed in by the boys? 

Turn off the lights when you leave the classroom.

1.the highest

2.the coldest

3.more convenient

4the hottest

5.more modern

6.the best

7.more narrow than

8.the most beautiful

9.more beautiful

10.hotter

1.D

2.C

3.B

4.A

V.

1.Alice has sunburn because she was outside all day yesterday

2.Some people say that carving eggshells is difficult

3.She is the most kind-hearted girl I have ever met

4.The Big Heart organization has encouraged people protect environment.

5.Tuan finds playing table tennis interesting because he can play it with his best friends.

6.They have never visited Ho Chi Minh City before

7.Lan likes talking to her friends in her free time

8.What is your brother's favourite hobby?

VI.

1.the highest

2.the coldest

3.more convenient

4the hottest

5.more modern

6.the best

7.more narrow than

8.the most beautiful

9.more beautiful

10.hotter