Two of the following proverbs have similar meanings. Which ones are they?

Question

Two of the following proverbs have similar meanings. Which ones are they?

Quizplus · Accepted Answer

Proverbs are short sayings that express a traditionally held truth or piece of advice.
-
Beggars can't be choosers expresses the idea that if one is in a bad situation, he or she must be content with what is given.
Two heads are better than one conveys the idea that when working together, more progress can be made.
Don't look a gift horse in the mouth warns against unappreciatively questioning a gift or handout too closely, as in looking into the mouth of a gift horse to understand its age, and thus, judging the value of the handout.
You can catch more flies with honey than with vinegar expresses that one can more easily get what he or she wants by being nice to people, instead of being mean or angry. 
Separate sheep from the goats conveys the idea of examining a group of things or people and then separating the good from the bad.
-
Beggars can't be choosers and Don't look a gift horse in the mouth are similar because they both have to do with the idea of accepting things, along with the warning of not doing so unappreciatively or by choosing.

Two of the Following Proverbs Have Similar Meanings. Which Ones Are They