Modals (Prime Time 4)

1 Mr Thomson ……… swim for two hours non-stop when he was young.

2 Deforestation ……… be controlled in order for the planet’s ecosystem to recover.

3 We ……… use biodegradable products as they don’t harm the environment.

4 Some experts believe that colonising space ……… solve the problem of overpopulation on Earth.

5 You ……… throw litter on the street. You’ll get a fine.

6 ……… I close the window? It’s a bit chilly in here.

7 They ……… pay admission to the museum because it was free that day.

  8    Hurry up! We ……… be at the station by 7:00 or we’ll miss our train.

9 Allan says he ……… do his school project on water pollution, but he’s not sure yet.

10 Samantha ……… watch the documentary on space exploration because her TV was broken.

11 We ..... to do what we can for those in need.

12 They ..... have gone to the park; it's raining heavily.