问题补充:
Despite the great difficulty we had out the plan, it paid off in the end.
A. carrying
B. carried
C. to carry
D. carry
答案:
A. carrying
B. carried
C. to carry
D. carry
解析:句意:虽然我们实施计划的时候很难,但是最后是有回报的。分析句子可知the great difficulty是先行词,后面是省略关系代词的定语从句,在定语从句中the great difficulty做宾语,所以用的是词组:have the great difficulty (in) doing,这里省略了in,所以选A。