zero conditional

If it doesn't ................. , plants cannot grow.

• to rain

• rains

• rain

• will rain

You need to take my sister to the hospital if she ......... milk as she is allergic to it.

• will drink

• drink

• drinks

• drinking

Water ........... if you boil it.

• evaporates

• will evaporate

• evaporate

• to be evaporated

If you heat ice, ..................

• it will melt

• it melts

• it will be melting

• it is melting

If you smoke, your skin ............. more quickly.

• age

• ages

• will age

• aging

If I .............. to cook, I ruin the food.

• had tried

• tried

• tries

• try

.................... if you drop it in water.

• ice floats

• ice is floating

• ice will floats

• ice will be floating

If the microphone _____(not to work), you _____(not to hear).

• does not work/ does not hear

• do not work/ does not hear

• do not work/ do not hear

• does not work/ do not hear

If my friend _____(to be) angry, her face always ______(to go) red.

• to be/ go

• are/ goes

• is/ go

• is/ goes

If Anna _____(to have) a birthday party, she usually _____(to invite) a lot of friends.

• to have/ invites

• has/ invites

• have/ invites

• has/ invite