问题补充:
I wondered what great difficulty he had the plan.
A. to carry out
B. carrying out
C. carried out
D. with carrying out
答案:
A. to carry out
(答案→)B. carrying out
C. carried out
D. with carrying out
解析:句意:我想知道他实施这个计划有多难。这句话用了have difficulty( in)doing这个词组,意思是“做…很困难”,这里因为是感叹句所以把what great difficulty放在了前面,选B。