Помогите пожалуйста с 188 упражнением. Просто с грамматикой по английскому туго(

2 If Mike goes to Australia he will stay at a hotel.
3 When he returns from his journey he will call me.
4 As soon as my parents come back Africa we will gather at our place.
5 When you cross the road you will see the Opera House in front of you.
6 If they are tired they will stop at a small town.
7 Don't go away until your friends come.
8 If he needs any help, he will ask you.
9 My friend will wait for you if you are late.
10 Don't worry if I am late tonight.