问题补充:
Nobody can imagine what difficulty we had home in the snowstorm.
A. walking
B. to walk
C. walked
D. to walking
答案:
(答案→)A. walking
B. to walk
C. walked
D. to walking
解析:考查非谓语动词和固定搭配。Have difficulty (in) doing sth做某事有困难,what difficulty we had home in the snowstorm是宾语从句,作谓语imagine的宾语。句意:没有人能够想象我们走雪地回家的困难。故选A。