fill in the blanks(用a或an填空).带解析
（1）I have_______orange
（2）look!He is riding _______bike
(3)My brother is _______university
(4)Is this ______umbrella?No,it isn't.It's _____stick
(5)This is _____ner book.It's_____English book
(6)I can see______young man in Picture 1.And I can see____old woman in Picture 2.
(7)Just____ minute.
(8)I'm____boy and you're ____girl.
(9)My uncle is ____actor and my aunt is _____actess.
(10)There is _____"A" in the word.