I. 单项填空 (共15小题; 每小题1分, 满分15分)
1.--- Jack, you return the book to the library,_______?
--- But I returned it the day before yesterday.
A. do you B. don’t you C. will you D. didn’t you
2. Mr. Boss has to go to New York on business on April 1, happens to be his wife’s birthday.
A. when B. which C. that D. why
