42. answer for (undertake responsibility for, be liable for, take charge for) 对…负责。
43. answer to (=conform to) 适合，符合。
44. be anxious about 为…焦急不安; 或anxious for
45. apologize to sb. for sth. 为…向…道歉
46. appeal to sb. for sth. 为某事向某人呼吁. appeal to sb. 对某人有吸引力
47. apply to sb. for sth. 为…向…申请; apply for申请; apply to 适用。
48. apply to 与…有关;适用
49. approve of (=consent to, be in favor of, favor, agree to, consider good, right) 赞成， approve vt. 批准
50. arise from(=be caused by) 由…引起。