Ответ:
1) He is sure that he won't manage to catch the bus.
2) Next year we will travel together to Moscow.
3) The exhibition opens to the public on Saturday, 15 July and is going to run until Saturday, 9 September.
4) I know that she will become a doctor one day.
5) They are going to run the race this weekend.
6) It's very dark. I will turn on the light.
7) He is going to be ten next month.
8) Scientists for sure will find a cure for cancer.
9) I will have some coffee, please.