I found I could easily make myself by using sign language.
A. understood
B. understand
C. to understand
D. being understood
网友回答
(答案→)A. understood
B. understand
C. to understand
D. being understood
解析：
这题考查过去分词做宾语补足语的用法，myself和understand是被动的关系。make sb done“使…被…”，根据句意：我发现用手势语很容易使自己被理解。选A。