—Tom has been fired by his boss.—？As far as I know he is a hard­working and considerat

问题补充：

—Tom has been fired by his boss.

—？As far as I know，he is a hard­working and considerate fellow.

A. Why not

B. How come

C. What then

D. So what

答案：

A. Why not

(答案→)B. How come

C. What then

D. So what

解析：考查交际用语。根据空处后面的话可知，第二个说话人对对方所说的话表示惊讶，故用How come？“怎么会呢？”。Why not“为什么不呢？”；So what“那又怎么了？”；What then“接下来会怎样？”。