There is not one of us wishes to help you . We are doing our best .A. whoB. that C. as D.

问题补充：

There is not one of us wishes to help you . We are doing our best .

A. who

B. that

C. as

D. but

答案：

(答案→)A. who

B. that

C. as

D. but

解析：关系副词when 引导限制性定语从句，在从句中充当状语，修饰先行词the days。