5 We ought to wash the vegetable carefully before we cook it.

6 My bike was fixed by my brother yesterday

7 It's the best milk tea I've ever tasted.

8 I've never gone on an eco-tour before

1 You'd better not eat this food because it is not good for you

2 The vegetable has been washed by my mother

3 It is very dangerous to ride bicycles here.

4 The grass in our school garden will be cut next week.

6 Unless you stop eating much, you won't lose weight

7 It is necessary to know English.

8 Everyone considers May Day to be the day of the working class.

9 We saw the house where Shakespeare was born in Stratford upon-Avon

10 There didn’t use to be nearly as many heavy lorries on the road.

Ex3

1 A nice blouse was bought for me by my mother

2 The company is said to be in difficulty

3 If you sunbathe, you can get a suntan.

4 We were asked to wait for a few minutes

5 I asked her where the best place to buy souvenirs was

6 There is lots of information in theatre programs.

7 He started collecting stamps five years ago

8 People are buying more newspapers in this city

9 Their son was being given some presents when we came.

10 Sorting out stamps takes him two hours a week.

Ex2

1 I wish I hadn't spent so much money

2 How high is the mountain?

3 I feel more tired after a car journey than I do after a train journey

4 Buses are slower than cars.

5 Turning off the light, he went out

6 If I had had a map, I wouldn't have got lost

7 It takes four hours to drive from Nam Dinh to Ha Noi.

8 The owner of the car must be abroad

9 I wish he had told me about this

10 The rain was too heavy for us to go swimming.

21 majority

22 natural

23 preparation

24 tropical

25 experienced

26 abruptly

27 luckily

28 destruction

29 central

30 extensive

11 luckily

12 disastrous

13 destruction

14 solar

15 sunny

16 cloudy

17 volcanic

18 scientists

19 completely

20 coastal

6 bored

7 boring

8 interested

9 interesting

10 amazed