She _______ wearing a pink and purple skirt.
A. is B. am
What’s he doing ?
----- _________________________
A.He is dancing .B. He is singing
Can I help you ?
-----___________________
A. YesB. Bye Bye.
What are these?
----- ___________________. 
A. These are a pair of shoes.B.These are shorts.
Where are you from?
----- ___________________.
A. I am from China .B.I am from Canada.
给下列单词归类（同一类的单词写在同一棵树上，只写序号）。
（1）（2）（3）
