问题补充:
What difficulty will you have people when you stay in a foreign country?
A. understand
B. understanding
C. to understand
D. understood
答案:
A. understand
(答案→)B. understanding
C. to understand
D. understood
解析:句意:当你在国外的时候,理解别人说的话,有什么困难吗?Have difficulty in doing sth.是固定用法,意思是做…有困难,选B。