择友与友谊
1. Birds of a feather flock together. 物以类聚，人以群分。
2. A man is known by his friends. 什么人交什么朋友。
3. Keep good men company and you shall be of the number. 近朱者赤，近墨者黑。
4. A friend in need is a friend indeed. 患难见真情。
5. A friend is easier lost than found. 得朋友难，失朋友易。
6. A faithful friend is hard to find. 知音难觅。
7. A friend is never known till a man has need. 需要之时方知友。
8. Misfortune tests the sincerity of friends. 患难见真情。
