They had a difficult time____there.A to get B getting C get D to getting

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They had a difficult time____there.A to get B getting C get D to getting

They had a difficult time____there.A to get B getting C get D to getting
They had a difficult time____there.A to get B getting C get D to getting

They had a difficult time____there.A to get B getting C get D to getting
B
have a difficult time doing/have difficulty doing
固定搭配

B
原因和楼上的一样。
语法还是少看一些吧,语感最重要。