The teacher did what she couldthat child.A. to helpB. helpingC. helpedD. helps

问题补充：

The teacher did what she couldthat child.

A. to help

B. helping

C. helped

D. helps

答案：

(答案→)A. to help

B. helping

C. helped

D. helps

解析：本题其中“what she could”是作为did 的宾语从句，后缺少一个目的状语，故选A