21. D they have difficulty finding qualified personnel at home
22. D seeks either his own or his children's development
23. A take cultural factors into consideration
24. C provide a detailed description of their study and work experiences
25. B the differences between the varieties of English
26. C rewarding
27. A girls will turn out to be less vulnerable than boys
28. B girls can gain equal access to education
29. C It will yield greater returns than other known investments.
30. D the economic and social benefits of educating women
31. C To prevent the car thier from restarting it once it stops
32. B self-prepared tools are no longer enough for car theft
33. A A coded ignition key.
34. D To allow for possible errors in the GPS system.
35. B contact the car owner
36. B Older parents can take better care of their children.
37. D They have to go on working beyond their retirement age.
38. C older parents tend to be concerned about their aging bodies
39. A Approaching of death.
40. C Not until they had the twins did they feel they had formed a family.