13. A. work B. jump C. walk D. result
12. A. mustn’t B. couldn’t C. needn’t D. may not
11. A. something B. anything C. nothing D. everything
10. A. to have B. to make C. to take D. to stay
9. A. with B. for C. as D. to
8. A. have found B. have taught C. told D. said
7. A. yet B. and C. or D. but
6. A. after B. for C. at D. to
5. A. health B. body C. study D. life
4. A. exercise B. homework C. running D. clothes