15.A group of foreigners visited the slums last weck, didn't they?
->Did a group of foreigners visit the slums last week?
16.They will build a hydropower station in the North of the country next year.
->A hydropower station wil be built in the North of the country next year.
17.They sell these chemicals everywhere in my hometown.
->These chemicals are sold everywhere in my hometown.
18.My children will turn off the lights when going to bed.
->The lights will be turned off by my children when going to bed.
IL Complete the following tag questions.
I. There's a new cartoon, isn't there?
2. They don't want to sell their house, do they?
3. This machine never works very well, doesn't it?
4. Your parents should stay in the hotel, shouldn't they?
5. We can't go camping today, can we?
III. Make the questions for the underlined parts in the following sentences
1. Most of my classmates go to school by bike.

-> How do most of your classmates go to shool?
2. It is about three kilometres from my house to school.

-> How far is it from your house to school?
3. The students are leaning road signs in the school yard.

-> What are the students learning in the school yard?
4. There are often traffic jams in the city centre in rush hour.

-> When are there often traffic jams in the city centre?
5. My father used to go fishing in the pond behind my house.

-> What did your father use to do?
6. Trung usually rides his bike very carefully.

-> How does Trung usually ride his bike?

7. I don't like skate-boarding because it is dangerous.

-> Why don't you like skate-boarding?
8. They decorate their classroom with the slogans on saving energy

-> How do they decorate their classroom?

9. Those are Lan's photos.

-> Whose photos are those?
10. Tokyo has a larger population than Jakarta.

-> Which city have a larger population than Jakarta?
IV. Rewrite the sentences,using the words in brackets
1. My mum wanted some meat,so she went to the supermarket. (because)

->Because my mum wanted some meat, she went to the supermarket.
2. Lan had stomachache because she ate too much bread.(so)

->Lan ate too much bread, so she had stomachache.
3. I couldn't sleep. I was tired. (in spite of)

->In spite of being tired, I couldn't sleep.
4. They have little money. They are very happy. (despite)

-> Despite having little money, they are very happy.
5. Hoa stayed up late. She tried to get up early. (although)

-> Although Hoa stayed up late, she tried to get up early.