他在回答前停顿了一下，"呃...呃...呃..."，然后才给出答案。

He paused before answering, "___do-do-do", then finally gave the answer.

孩子们跟着音乐节奏开心地唱着‘嘟嘟嘟’。

The children happily sang '___do-do-do' along with the musical rhythm.