【急】4道初一水平的英语单项选择题【速度、给分】

【急】4道初一水平的英语单项选择题【速度、给分】
1.I________an English book when the bell rang.
A.read B.will read C.am reading D.was reading
2.Difficult work________easy if you do it very carefully.
A.become B.bacame C.will become D.has become
3.My e-mail_________to you last night.Have you received it yet?
A.sends B.sent C.is sent D.was sent
4.------It's raining.Maybe we can go out when the rain stops.
------But do you know__________?
A.when the rain will stop B.when the rain stopped
C.when will the rain stop D.when did the rain stop