Poor speaker of English though he was at the time,

Poor speaker of English though he was at the time, he still managed to make himself__ .
A:understand B:understood
C:understanding D:to understant

求详解呀

B
make one's self understood 使自己被明白。

to be understood当然是最好的了，没有只能退而求其次了⋯⋯

如有问题，欢迎继续追问：）
求采纳～

A make sb do 再看看别人怎么说的。