33.You can't imagine what difficulty we had ______ home in the snowstorm.[2007 辽宁卷]A.walked B.walk C.to walk D.walking为什么选D?

33.You can't imagine what difficulty we had ______ home in the snowstorm.[2007 辽宁卷]
A.walked B.walk C.to walk D.walking
为什么选D?

have difficulty doing sth
what difficulty we had 是个从句

固定搭配
have difficulty in doing sth.
其中的in可以省略~

you can't imagine walking home is very hard.
动名词

D. walking
应该是what difficulty we had (in doing sth)
考察 have difficulty in doing sth

Have difficulty doing sth,difficulty被提前了

have difficulty (in) doing