— How Jack?— He is fine.A. areB. isC. amD. /

问题补充：

— How Jack?

— He is fine.

A. are

B. is

C. am

D. /

答案：

A. are

(答案→)B. is

C. am

D. /

解析：根据Jack是第三人称，故用is。本句的意思是“杰克好吗？他很好”所以本题选B。