44. 去掉to　　 45. try → trying　　

　　　　 D) 46. 去掉on　 47. relax → to relax　 48. much → many　　 49. √

40.√　　 41. lose → lost　　 42. is → are　　 43. longer → long

33. In → On　　 34. cooker → cook　　 35. guest → guests

　　　　 C) 36. but → and 37. In → On 38. his → her 39. look 后加 for

30. goes → went　 31. staying → stayed　 32. ago → before

23. lose → lost　 24. by → in　 25. √

　　　　 B) 26. fish → fishing　 27. well → good　 28. √　 29. little → few

19. 去掉has 20. help → helping　 21. 去掉to 22. asking → to ask

13. A; shortest → the shortest　 14. C; 去掉do　 15. C; have → has

10. A; will leave → leave　 11. D; alone → lonely　 12. D; proud → pride　

7. A; for → of　 8. B; beautiful → beautifully　 9. B; solving → to solve