The doctors have done they could the child.A. whatever; to saveB. everything ; saveC. all

问题补充：

The doctors have done they could the child.

A. whatever; to save

B. everything ; save

C. all what; to save

D. all which; save

答案：

(答案→)A. whatever; to save

B. everything ; save

C. all what; to save

D. all which; save

解析：考查名词性从句。句意“那些医生已经尽最大努力来拯救那个小孩。”all that相当于what，排除C；all作先行词时，定语从句引导词用that，排除D；do sth. to do sth.用不定式表示目的，排除B。故选A。