21. A friend is easier lost than found.
得朋友难，失朋友易。

22. A friend is never known till a man has need.
需要之时方知友。

23. A friend without faults will never be found.
没有十全十美的朋友。

24. 'After you' is good manners.
"您先请"是礼貌。

25. A good beginning is half done.
良好的开端是成功的一半。

26. A good beginning makes a good ending.
善始者善终。

27. A good book is a good friend.
好书如挚友。

28. A good book is the best of friends, the same today and forever.
一本好书，相伴一生。

29. A good conscience is a soft pillow.
不做亏心事，不怕鬼叫门。

30. A good fame is better than a good face。
美名胜过美貌?