---Who is that girl sitting there?-Well if you must know her name is Jenny.A. friendly

问题补充：

---Who is that girl sitting there?

---Well, if you must know,her name is Jenny.

A. friendly

B. lonely

C. lovely

D. quietly

答案：

A. friendly

B. lonely

(答案→)C. lovely

D. quietly

解析：句意：在那悄悄坐着地女孩是谁？如果你确实想知道，她叫詹尼。A有好的，形容词B孤独的，形容词，C可爱的，形容词，D悄悄地，副词。形容词在句中做定语或表语，副词用来修饰动词，在句中，修饰坐的方式，故选D。