The image of a devoted and noble angel in white heals the wounded and rescues the dying i

问题补充：

The image of a devoted and noble angel in white heals the wounded and rescues the dying is making a comeback the nation faces a crisis.

A. that…because

B. who…when

C. which…that

D. what…as

答案：

A. that…because

(答案→)B. who…when

C. which…that

D. what…as

解析：who引导的是定语从句，修饰先行词angel in white白衣天使；而 when引导的是时间状语从句，表示当国家（民族）面临危机时。