What are you doing?
A.I’m making a cake. B.I’m making noodles.
What are they doing? They are .
A.playing chess. B.doing taijiquan.
What is he doing? He’s .
A.playinga toy train. B.taking pictures.
Look at the people .
A.on the lake. B.under the tree.
请将下列单词中不同类别词挑出来，把该词的序号写在前面的括号里。
（1）A.lionB.tiger C.animalD.elephant
（2）A.five B.clockC.seventeen D.twenty
（3）A.cakeB.cameraC.sweetsD.bread