The cat is ____ a mouse now .
chasing B. chase C.chases
His father is a police _____.
A.poseman B. office C. officer
How many ____ are there ?
A.mouse B.mouses C. mice
Are you__about your little son?
A.woorried B.worry C.worryed
选出不同类的单词
( )（1）A.sad B.worried C.mouse
( )（2）A.grass B.sunny C.rainy
( )（3）A.count B.go C.deep
( )（4）A.deep B.take C.feel
music .