Câu VII: 
1. was appointed – became
2. Having written
3. sitting – had not/ hadn’t flown
4. had the president arrived
5. are always talking
6. will have learned( or will have been learning)
7. was being prepared
8. has visited

Câu VI.
1. impolitely
2. disastrous
3. performance
4. misunderstanding
5. Conservationists
6. fasten
7. unpredictable
8. dead
9. excitedly
10. educational