1 When they were walking down stairs, they heard a strang noise.

2 Returning home very late the man couldn't buy anything to eat in the evening.

3 You should put the affected part under a running cold.

4 Sall I come to the airport with you?

5 People use first-aid  to ease the victim's pain and anxiety.

6 Don't overheat the victim with the blanket or coat.

7 The deposit is returned when people bring the cans back for recycling.

8 You should cool the burns immediately so as to minimixe tissue damage.

9 We're delighted that you are interested in protecting the environment.

10 You should cover the burn area with a thick sterile dressing.

11 What should our goverment do to prevent people from littering on the streets.

12 We should use cloth bags instead of plastic bags to protect the environment.

13 My sister sold all the empty cans to raise funds for the orphans.

14 You mustn't go uot late at night because it's very dangerous.

15 The milkman brings bottles of milk to house and collect empty ones.

16 Farmers collect household and garden waste to make compost.

17 We should do more and save natural resources to protect the environment.

18 Boys and girl have to do this experiments themselves this afternoon.

19 The victim should drink a cup of tea when reviving.

20 The victim is head should be below the level of the heart.