Ответ:
1) She is going to have lunch with Robert at one o'clock on Saturday.
2) I am speaking English very well in five years’ time.
3) My sister will fly to London at seven tomorrow.
4) I think life is going to be different next decade.
5) My parents will visit their friends in Novgorod next week.
6) Sam has bought some bricks. He is building a garage.