Beggars must not be choosers.

例句：

1. 1.The poor man was given a small sum of money as a gift.
   这个穷人被给了一小笔钱作为礼物。
2. 2.The beggars were not allowed to choose their own food.
   乞丐们不被允许选择他们自己的食物。
3. 3. The beggars must not be chosen by the rich.
   乞丐们不能被富人挑选。