Task 1:

1, B – character

2, C – generous

3, B – volunteer

4, C – know

5, C – booked

6, A – message

7, D – commerce

8, C – furniture

Task 3

1, cover

2, to cause

3, don’t enjoy

4, go out

5, am

6, is teaching

7, rises; sets

8, do you do

9, doesn’t drink; drinks

10, are falling

Task 4:

1, What a careful driver he is!

2, It is dangerous to drive too fast.

3, It took us four hours to climb the Chau Thoi Mountain.

4, Because he got up late, he missed the bus.

5, She does all of the housework on her own.

6, He isn’t hard-working enough to get good marks.

7, They are going to invite her to come over for dinner tonight.

8, The question is so easy that all of the students can answer it.