Life is just like a journey with unknown destination during which people can meet with

问题补充：

Life is just like a journey with unknown destination, during which people can meet with barriers of all kinds.

A. /; the

B. the; /

C. an; the

D. an; /

答案：

A. /; the

B. the; /

C. an; the

(答案→)D. an; /

解析：可联系答.案.网客服索取。