1 an
2a
3 an ,the
4the
5the和a均可
1、Which class are you in?
2、Whose sister is she?
3、How old is her brother?
4、What's your name?
5、Where is Tom's mother?
6、How many students are there in your class?
7、Who is your father?
8、What color is your pen?
9、What's her phone number?