补全对话。
Anna: ____.
John: ____. Can I have a look?
Anna: ____. Here you are.
John: ____.
John: You are welcome.
A. Sure!
B. I have a nice cat.
C. Oh, really?
D. Thank you.
E. Oh! It's nice. I like it.
My parents are ________ with my good grades.
如果采用样方法调查某地区（甲地）蒲公英的种群密度，下列做法中正确的是（ ）
——Can you come to my party on Saturday afternoon?
—— .I'll have to help my parents.
