冠词填空：在下列句中空白处填入适当冠词,不需用冠词处划
6．It's too hot．Open _______ door,please．
7．There is _______ woman over there． _______ woman is Meimei's mother．
8． _______ sun rises in _______ east．
9． _______ Changjiang River is _______ longest river in _______ China．
10．Are you going to do it _______ second time?