Giúp mình với ạ có công thức càng tốt

=>

37. She had difficulty in understanding what he was talking about.

-> had difficulty in Ving: gặp khó khăn trong

38. I was so interested in the film that I saw it twice.

-> be interested in: thích thú, quan tâm

39. I'm surprised that Nam replied intelligently.

-> replied là động từ (cần trạng từ)

40. The house in which they are living is lovely.

-> in which ~ where