Ex5:

1. From the airport and the train stations.

2. Trucks are bringing fresh fruits and vegetables into the city. Ships are bringing food and fuel to the harbour.

3. Commuters are people live in the big city and the suburbs

4. No, they don't.

5. They blow their whistles.

Ex6:

a, I used to be afraid of ghost when I was a child.

b, I used to smoke 5 years ago.

c, Jack is too young to ride a motorbike.

d, It took me 15 minutes to walk to school.

e, We used to have lots of friends when we lived in the country.

Bài 5:

1, Taxis are bringing tired people from the airport or train stations to the hotels

2, Trucks are bringing fresh fruits and vegetables into the city

Ships are bringing food and fuel to the harbuor

3, Millions of people live in the big city and millions of people who work in the big city live in the suburbs are commuters

4, No they don't because they have to be hurry

5, The police blow their whistles to stop the traffic or to hurry it along

Bài 6:

- It took me 15 minutes to walk to school 

- We used to have lots of friends when we live in the city