Open the brackets: 1.we (go) on a picnic of the weather (not/wet). 2.if you (travel) of london by plane,it(take) you about three and a half hours. 3.the population of australia (grow) if more people (settle) there.

1.We will go on a picnic if the weather isn't wet.
2.If you travel to London by plane,it will take you about three and a half hours.
3.The population of Australia will grow if more people settle there.