My father finds maps hard to follow => My father has
My father finds maps hard to follow => My father has ___________.
Đáp án: My father has difficulty following the maps.
Giải thích: have difficulty Ving: gặp khó khăn trong việc gì
Dịch: Cha tôi gặp khó khăn trong việc theo dõi bản đồ.