What are the answers? i'm confused

Number 11 is donde because it is asking where do you study
 

5-cuando
6-porque
7-quien es
8-cual
9-como
10-cual
11-Donde
12-porque or cuando

Agame in which two or four players strike a ball with rackets over a net stretched across a court. the usual form (originally called  lawn tennis  ) is played with a felt-covered hollow rubber ball on a grass, clay, or artificial surface.

Mexico, china, and many more