I usually clean my room.

Sometimes I help my mom ____.

A. cook　　B. cooks　　C. cooking

--What do you usually do?

--I usually go swimming ______ the pool.

A. on　　 B. at　　 C. to

--What do you usually ____ after school?

--I usually practice the violin.

A. do　　B. are　　C. in

选择合适的答

-- I usually play at _____.

A. the Sports Center　 B. afternoon　　C. football