1. Two heads are better than one. You should consult your matter with him. 2. Sorry, I couldn't attend your party. I was knee-deep in preparation of upcoming meeting. 3. What's the matter? You're looking deep in thoughts. A problem shared is a problem halved. You can share your matters with me. 4. That's a good point, but it looks impractical. 5. All that glitters is not gold. That's why you should be practical and more careful than usual in your new job.