单项选择题
A.Didn't you? B.How did it go? C.I bet you had a great time. D.I guess you did.
A.I back you up. B.Who cares7 C.I'm with you. D.I like the rain.
A.I was born in 1990 B.I've been here for years C.I'm 19 years old D.I'm a first-year student