找出下列各组中不同类的一项,将序号填在括号内。
( )⑴A. blackboard B. window C. lunch box
( )⑵A. stand up B. sit down C. pencil case
( )⑶A. drink B. sleep C. parrot
( )⑷A. crayon B. schoolbag C. library
( )⑸A. talk B. pie C. cake
( )⑹A. open B. book C. close
( )⑺A. black B. yellow C. jacket
( )⑻A. my B. you C. your
( )⑼A. milk B. sweet C. cake
( )⑽A. look at B. good morning C. listen to