—Thank God you're safe!
—I stepped back，just ________to avoid the racing car.
A. in time B. in case
C. in need D. in vain
In order to find the missing child，villagers ________all they can over the past five hours.
A. did B. do
C. had done D. have been doing
—Alvin，are you coming with us?
—I'd love to，but something unexpected ________.
A. has come up B. was coming up
C. had come up D. would come up
—Look！Somebody ________the sofa.
—Well，it wasn't me.I didn't do it.
A. is cleaning B. was cleaning
C. has cleaned D. had cleaned
—I remember you were a talented pianist at college.Can you play the piano for me?
—Sorry，I ________the piano for years.
A. don't play B. wasn't playing
C. haven't played D. hadn't played
假定你是李华，正在一所英国学校学习暑期课程，遇到一些困难，希望得到学校辅导中心(Learning Center)的帮助。根据学校规定，你需书面预约，请按下列要点写一封信：
1．本人简介；
2．求助内容；
3．约定时间；
4．你的联系方式(Email：lihua@1236.com；Phone：12345678)。
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Look forward to your reply.
Yours，
Li Hua
