问题描述：
The birds are singing ____ the tree.横线上可以填on吗
1.It's for____baseball.
A.play B.played C.playing
选哪个
2.When you want to buy things,the assistant will say“____”
A.Can I help you?B.What do you want?
应该AB都可以吧
3.It____in Beijing yesterday.
A.rain B.rained C.rainy
选哪一个
1.It's for____baseball.
A.play B.played C.playing
选哪个
2.When you want to buy things,the assistant will say“____”
A.Can I help you?B.What do you want?
应该AB都可以吧
3.It____in Beijing yesterday.
A.rain B.rained C.rainy
选哪一个
问题解答：
我来补答展开全文阅读