Ответ:
1. We will speak about it when the lesson is over.
2. Don`t forget to clean the flat before your uncle arrives.
3. As soon as I return from Australia, i will ring you up.
4. If you miss your train, you can take another one.
5. When they go to Canberra next year, they will visit the National Library.
6. Before he goes for Edinburgh, he will spend some days in London.
7. She will wait for him, untill he comes back.
8. If you enter Madame Tussaud`s museum, you will see a lot of figures.
9. I will wait for my brother till he comes.
10. If parents give him money, he will spend them on books.
Task II.
1. If it is rainy, i will stay at home
2. If it is very hot, they will go to the beach.
3. If it is cold and snowy, i shall watch TV at home.
4. If there is fog tomorrow, i shall stay at home.
Task III.
1. If Peter comes to my place, we go to play in the yard.
2. If Peter didn`t come to my place, i would watch TV.
3. If Frank's parents had their holidays in summer, they would go to the seaside.
4. If they have their holidays in winter, they stay at home.
5. When I finish my work, i will go to the cinema.
6. We will buy this book as soon as our mother gives us some money.
7. I would return you your ring when you asked me.
8. I will wait for my friend until he comes from the shop.
9. My father started writing before the sun rose.
10. As soon as you finish your study I will present you a new flat.