Răspuns:
1. keep your wits about you - being alert and ready to act in a difficult situation
2. at my wits' end - tried every possible source without success
3. scared out of my wits - shock or frighten somebody very suddenly
4. to the best of my knowledge - used for saying that you think your statement is true
5. common knowledge - knowledge that is known by everyone or nearly everyone
6. on the brain - keep thinking about something constantly
7. pick your brains - obtain information by questioning someone who is better informed about a subject than oneself.
8. racking my brains - to try very hard to remember something or to solve a problem
