My friend likes singing and talking with others. But I often stay at home to watch TV. So

问题补充：

My friend likes singing and talking with others. But I often stay at home to watch TV. So my friend is than me.

Aseriouser

B. more serious

C. calmer

D. more outgoing

答案：

A. seriouser

B. more serious

C. calmer

(答案→)D. more outgoing

解析：句意为我的朋友喜欢唱歌，和别人谈话；但是我经常呆在家里看电视。相比之下我的朋友比我外向。所以选D 。