从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. —What about going swimming this afternoon, Tom?
—_____. I have a test tomorrow, so I have to go over my lessons today.
A. I’d like to B. I’ll take it C. I’d rather not D. I don’t think so
2. ____ strong earthquake struck ____ eastern coast of central Japan on March 11th, 2011.
A. A; a B. The; the C. The; a D. A; the
3. All the books donated by the students from urban schools are said ____ to the students in rural areas the other day.
A. to be sent B. being sent C. having been sent D. to have been sent
4. Oh, boy, why are you killing your time this way? Can’t you find something ___ doing?
A. useful B. worthy C. valuable D. worth
5. The government urged that every effort ____ to bring down food prices.
A. is made B. will be made C. be made D. must be made
