It ______________ to know what you don’t know.
举一反三
- It is good for you to know what you don’t know. (pay)
- 中国大学MOOC: It ______________ to know what you don’t know.
- --Do you know Jim quarreled with his wife? --I don’t know. _____.
- If you____________ to know what you don’t know, you’ll only make a fool of yourself.
- If you don’t know the answer, what should you do?