一、单项选择（共15小题，每小题1分，满分15分）
( )1. —Lily，there is ________ schoolbag near the window. Is it yours?
—Yes，it is. Thank you!
A. a B. an C. the D. /
( )2.The accident happened ________ a hot Sunday afternoon last July.
A. for B. on C. at D. in
( )3.—Please don’t throw paper on the ground.
—_________, I won’t.
A. Excuse me B. That’s all right C. Sorry D. It doesn’t matter.
