( )I often swim _______ weekends.
A. at B. in C. on
( ) I like play basketball, _______ you?
A. how are B. how about C. how old
( )Sometimes she watches _______ TV.
A. a B. the C. /
( )What _______ Mike _______ at weekends?
A. do;do B. is;do C. does;do
（）My father sometimes _________ to the library on foot.
A.goB. going C. goes