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---May I borrow your book Steve Jobs ?
--- ________ you return it before Friday.

_____ I always felt I would pass this monthly exam, I never thought I would get an A.
A. While           B. Once        C.  As         D. Because

Many young people don't work hard, and regret it later when the opportunity is gone.They only realize it________it is too late.

—How long will you graduate from senior middle school?
—It will be less than one year________I graduate.

(2013·高考陜西卷)I have heard a lot of good things about you________I came back from abroad.

(2013·高考江西卷)She says that she’ll have to close the shop________business improves.

(2013·高考四川卷)He is so busy.He cannot afford enough time with his son________he wants to.

Some college students are seen doing _____work they can find to support themselves.

He said it was this classroom _______ he found his lost watch and _____ he would take good care of it from then on.

---What do you think of my homework?    ---Good work，________ a few slight mistakes.