—Do you know the song Come on Haixi!—Yes and I sing it well.A. must B. can C. need

问题补充：

—Do you know the song Come on, Haixi!—Yes, and I sing it well.

A. must B. can C. need

答案：

解析：情态动词的考查。Must意为“必须”，can能够；need需要，根据句意应该是“能够”。