I:

1/d

2/a

3/b

4/b

5/c

6/a

7/a

8/a

II:

1/were watching - phoned

2/waiting

3/Have - known
 Have been

4/rang 

5/moves (đây là sự thật hiển nhiên nên không lùi thì)
6/have - seen

III phần này mình hơi yếu nên xin phép không làm
SECTION B:

I:

1/on     2/of     3/sat      4/had      5/a     6/were    7/ like    8/where    9/was    10/it

II:

1/c

2/d

3/d 

4/a

5/d

6/a

7/d 

8/không biét 

9/b

10/mình hơi phân vân c và d

=>
I/
1. D when
2. A standing
3. B made
4. B look up
5. C which
6. A talking
7. D who wins
8. A sure 

II/
1. were watching/phoned
2. waiting
3. Have you known/were
4. is ringing
5. moves
6. have ever seen
III/
1. behavior
2. pronounciation
3. proud
4. mountainous
5. flights
6. treatment
7. arrival
8. uncomfortable

IV/
1. A -> It's not difficult
2. B -> how to explain

3. A -> was pleased
4. B -> great
5. C
6. C -> appearing
7. C -> playing
8. B -> took

B/
I/
1. on
2. of
3. sat
4. had
5. a
6. were 
7. like
8. where
9. was
10. it

II/
1. tourists
2. population
3. capital
4. climate
5. temperature
6. famous
7. visit
8. sightseeing
9. trip
10. flights