( )21．Tom can play ______ chess, but he can't play ______ violin.
A. a; a B. a; the C. /; the D. the; the
( )22．Are you good ______ kids（孩子）?
A. at B. with C. for D. of
( )23． Every morning Tom has_____ quick breakfast and then goes to work by ____subway.
A.a; / B. /; the C. a; the D.a , a
( )24． There are rules in my school. I have to learn .
A.a lot of ; lots of B. lot of; a lot of
C. a lot of ; a lot D.lots of ;a lot of
