Question

8 Put the verbs in brackets into the appropriate tenses to form Type 1 conditional sentences. 1 If you use (use) less paper, you .......... (save) the rainforests. 2 The polar bear ...... (not/become) extinct if we...... (stop) global warming. 3 You ...... (waste) electricity if you ...... (leave) your computer on standby. 4 ........ the ice caps......... (melt) if temperatures ........(rise)? 5 If you ..... (ride) your bike, you ........(not/cause) air pollution. 6 We ........(reduce) waste if we......... (recycle) rubbish. 9 Rewrite the sentences. Use if or unless. 1 Unless we stop burning fossil fuels, global temperatures will rise. If we don't stop burning fossil fuels, global temperatures will rise. 2 If we don't help save the animals, they will become extinct.......................................3 Unless we recycle more, we won't have a place for all the rubbish.........................................​

Answer 1

8

1. If you use less paper, you will save the rainforests.
2. The polar bear will not become extinct if we stop global warming.
3. You will waste electricity if you leave your computer on standby.
4. Will the ice caps melt if temperatures rise?
5. If you ride your bike, you will not cause air pollution.
6. We will reduce waste if we recycle rubbish.

9

1. If we don't stop burning fossil fuels, global temperatures will rise. (Using 'if')
2. Unless we help save the animals, they will become extinct. (Using 'unless')
3. If we don't recycle more, we won't have a place for all the rubbish. (Using 'if')

Answer 2

1. If you use less paper, you will save the rainforests.
2. The polar bear will not become extinct if we stop global warming.
3. You will waste electricity if you leave your computer on standby.
4. Will the ice caps melt if temperatures rise?
5. If you ride your bike, you will not cause air pollution.
6. We will reduce waste if we recycle rubbish.

Rewritten sentences using "if" or "unless":

1. Global temperatures will rise if we don't stop burning fossil fuels.
2. If we don't help save the animals, they will become extinct.
3. Unless we recycle more, we won't have a place for all the rubbish.