两题是连在一起给答案.
1个回答

下次把这样的问题发到英语分类下面.你发在化学分类下了.

12-1 playing

-2 are

-3 sendding

-4 birds

13-1 I miss everyone in China

-2 The birds are singing in the tree

-3 We are looking at some duck s

-4 the ducks are swimming in the wate