1.if she goes to the sea, she ( 2.if the children ( the playground,they (. 3.if i (,i( a secret. 4.if they ( grandparents,they (

1.If she goes to the sea, she will swim.
2.If the children go to the playground,they will play football.
3.If I don't see her,I won't tell a secret.
4.If they go to grandparents,they will fish.

1) will swimming
2) going
4) going