21．This book is said to be a special one, which____many events not found on other history books.

is MrWhite, do you know—I don’t know exactlyBut I think he can be_______but a doctor

12. Half of the students will have sports, and the rest _____ to be here in the classroom studying.

We’ll carry the work through , cost _______ it may

Older staff members are more while younger ones are more and have better foreign language skills.