.(2008重庆) During the Spring Festival, the heavy snow stopped many people from_______back home.
A.go B.goes C.went D.going
2.(2008宁波) It’s a serious problem.We can’t decide _____Mr.Harris comes back.
A.while B.since C.until D.so
3.(2008扬州) Work hard,______you’ll pass the English exam this time.
A.or B.but C.because D.and
