题干
Nobody can imagine what difficulty we had ________ home in the snowstorm.
A：walking
B：to walk
C：walked
D：to walking
答案(点此获取答案解析）
A
Nobody can imagine what difficulty we had ________ home in the snowstorm.
A：walking
B：to walk
C：walked
D：to walking
，则
等于（ ）
