找出下列各组中不同类的一项,将序号填在括号内。
()⑴A. blackboard B. windowC. lunch box
()⑵A. stand up B. sit down C. pencil case
()⑶A. drink B. sleepC. parrot
()⑷A. crayonB. schoolbag C. library
()⑸A. talk B. pie C. cake
()⑹A. openB. book C. close
()⑺A. blackB. yellow C. jacket
()⑻A. myB. youC. your
()⑼A. milkB. sweet C. cake
()⑽A. look atB. good morning C. listen to