I didn't catch... 我没听清楚……
1. I didn't catch your name.
2. I didn't catch what you said, please repeat it.
3. He spoke so rapidly that I didn't catch the meaning of what he said.
A: The answer for number 6 is C, 7 is B, 8 is A...
B: Ms Lee, could you tell me what number 7 is again? I didn't catch you.
A: Sure. 7 is B. Any others?
B: No, thank you.