英语题 要过程 翻译 谢谢

英语题 要过程 翻译 谢谢
1-write to me when you have time.-sure.But __________is your e-mail address?
A. whereB.when C.whatD .which
2.when student leave the classroom, they should walk out of the classroom _______.
A togetherB in a hurry C one by one D at he same time
3.there's a ten-minute break _______classes.
A. betweenB.among C.withD.in
4._______we can see millions of stars in the sky,but we can see nothing at all_______.
A. In night,at dayB.At the night,at the day C.At night,in the dayD.In the night,in the day
5.l saw a boy_______out of the room a monment ago.
A. runB.runs C.ranD.to run