What ______ in your school in the past few years—A new library and a playground were built last year.

I will spend half of my holiday practicing English and _____________ half learning drawing．

The two friends ______on the Internet for three hours, and they would go on till the next morning

How does he usually spend his weekends —-He spends as much time as he can ____ the piano .

22．I_____stop by sometime and thank her for all her help.