Помогите поставить глаголы в подходящее время.1. The expedition (to cover) hundreds

Помогите поставить глаголы в подходящее время.

1. The expedition (to cover) hundreds of kilometres, but they still (to be) far from their destination.

2. You (to go) to Great Britain next year?

3. Yesterday Nick (to say) that he (to read) much during his summer vacation.

4. At the age of twenty my father (to combine) work and study.

5. A great number of students (to study) in the reading room when I (to enter) it last night.