-Who is that man sitting there?----Well if you must know his name is Jack.A. friendl

问题补充：

---- Who is that man sitting there?

----Well, if you must know, his name is Jack.

A. friendly

B. lonely

C. lively

D. quietly

答案：

A. friendly

B. lonely

C. lively

(答案→)D. quietly

解析：friendly形容词，友好的；lonely，形容词，孤独的；lively形容词，活泼的；quietly副词，安静地。句意：安静地坐在那边的那个人是谁？副词在在句子中一般位于动词后面做状语，故选D。