I

1.go/by bus

2.go/on foot

3.cycle

4.walk 

5.drives

6.takes/car

II

1.I didn't used to

2.I used to

3.I didn't used to

4.I didn't used to

5.I used to

III.

1. The traffic/ a nightmare/ visitors/ Viet Nam/ the first time.

=> The traffic can be a nightmare for visitors to Viet Nam for the first time.

2. There/ transport rules/ but/ many people/ not seem/ really interested/ follow/
them.
--> There are many transport rules but many people don't seem really interested in following them.

3. Three or four people/ one motorbike/ a common sight/ particularly/ young
people.
-->Three or four people on one motorbike is a common sight, particularly with young people.

4. The traffic/ worst/ rush hours/ when/ everyone/ try/ get to work/ get home
quickly.
--> The traffic is worst during rush hours when everyone try to get to work and get home quickly.
5. Some people/ ride/ motorbikes/ the pavements/ rather than/ waiting/ a
traffic jam.
--> Some people ride their motorbikes on the pavements rather than waiting in the traffic jam.

6. Pedestrians/ get injured/ hit easily/ when/ they/ walk/ the pavements/ cross
the roads/ such times.
--> Pedestrians can get injured and can be hit easily when they walk on the pavements and cross the roads at such times.
7. Road users/ very impatient/ quite aggressive/ constantly using their horns/
even shouting/ others.
--> Road users become very impatient, quite aggressive, constantly using their horns, even shouting at others.

8. Some people/ install/ air horn/ their motorbikes/ this/ really annoying/ other
people/ sometimes/ it cause/ accidents.
--> Some people install air horn on their motorbikes, this is really annoying for other people and sometimes it causes accidents.

9. Another problem/ the increase/ the number/ cars/ the road.
--> Another problem is the increase of the number of cars on the road.

10. More people/ own/ private cars/ it/ make/ the problem/ the traffic jams/
worse.
--> More people have their own private cars and it makes the problem of the traffic jams worse.

IV

1.The new restaurant looks good;however, it seems to have few customers.

2. Although we had planned to walk right round the lake , the heavy made this impossible.

3.I've been too busy to answer by email; nevertheless, I'll do it soon.

4.Despite Mary's sickness, she didn't leave the meeting until in ended.

5.In spite of living in the same stree, we rarely see each other.

B1.....1.go/ by bus

2.go/ on foot

3. ride my bike

4. walk

5. drives

6.goes / by car

Ex2

1. I didn't use to

2. I used to

3. I didn't use to

4. I didn't use to

5. I used to