六年级上册英语书16页 15页20页

我只知道20页的答案..
20页参考答案：
1.Peter is opening the door.
2.Mingming is singing .
3.Anne is eating .
4.Lingling is walking .
5.Mr Lin is sleeping .
其实只要主格后加be动词就行……be动词：am is are
am用在“我（I）”后 is用在“他（He）她（She）它（It）”are用在“你（You）”