21. For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employers.

　　22. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs.

　　23. The effective work of maintaining discipline is usually performed by students who advise the academic authorities.

　　24. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.

　　25. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.

　　26. We also value personal qualities and social skills, and we find that mixed-ability teaching contributes to all these aspects of learning.

　　27. They also learn how to cope with personal problems as well as learning how to think, to make decisions, to analyse and evaluate, and to communicate effectively.

　　28. The problem is, how to encourage a child to express himself freely and confidently in writing without holding him back with the complexities of spelling?

　　29. It may have been a sharp criticism of the pupil’s technical abilities in writing, but it was also a sad reflection on the teacher who had omitted to read the essay, which contained some beautiful expressions of the child’s deep feelings.

　　30. The teacher was not wrong to draw attention to the errors, but if his priorities had centred on the child’s ideas, an expression of his disappointment with the presentation would have given the pupil more motivation to seek improvement.

　　31. Given the nature of government and private employers, it seems most likely that discrimination by private employers would be greater.

　　32. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi.

　　33. A spirited discussion springs up between a young girl who says that women have outgrown the jumping-on-a-chair-at-the-sight-of-a mouse era and a major who says that they haven’t.

　　34. They are trying to find out whether there is something about the way we teach language to children which in fact prevents children from learning sooner.

　　35. Mathematicians who have tried to use the computers to copy the way the brain works have found that even using the latest electronic equipment they would have to build a computer which weighed over 10,000 kilos.

　　36. Since different people like to do so many different things in their spare time, we could make a long list of hobbies, taking in everything from collecting matchboxes and raising rare fish, to learning about the stars and making model ships.

　　37. They know that a seal swimming under the ice will keep a breathing hole open by its warm breath, so they will wait beside the hole and kill it.

　　38. We may be able to decide whether someone is white only by seeing if they have none of the features that would mark them clearly as a member of another race.

　　39. Although signs of dishonesty in school , business and government seem much more numerous in years than in the past, could it be that we are getting better at revealing such dishonesty?

　　40. It is not quite a matter of disagreeing with the theory of independence, but of rejecting its implications: that the romances may be taken in any or no particular order, that they have no cumulative effect, and that they are as separate as the works of a modern novelist.