1

Water boils if you---heatingheatsheatit to 100 ºC.

2

If you mix red and yellow, you---gotgetgetsorange.

3

Butter---meltmeltingmeltsif you leave it in the sun.

4

If you've got a headache,---taketakestakingan aspirin.

5

If you add sugar, it---tastingtastestastesweet.

6

A dog---bitesis bitingbiteif you go near its food when it's eating.

7

If you pull a cat's tail, it---scratchesscratchedscratchyou.

8

You have more chance of being killed if you---doesn't weardon't weardidn't weara seat belt.

9

You can end up brain damaged if you don't---wearingwearwearsa crash helmet.

10

If you press this switch, the DVD player---comescomingcomeon.

11

If she comes home very late, her parents---gettinggetsgetvery angry.

12

If you---leftleavesleavegates open in the country, the animals escape.

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