48. It took me four hours to get to the beach.

Giải thích:    It + takes (took) + O + thời gian + to V

49. I would like to try surfing someday.

Giải thích:    want = would like  ('d like)

50. He studies hard, so he gets good marks.

Giải thích:   so: vì thế, nên

                    because: vì, bởi vì

                 Dịch 2 mệnh đề ra là lm đc.

51. My mom got tired because she worked all day.

Giải thích:   Cách lm giống Câu 50

52. I spend 10 minutes doing exercise.

Giải thích:     S + spend (spent) + thời gian + V-ing

48.It took me four hours to get to the beach.

49.I would like to try surfing someday.

50.He studies hard so he gets good mark.

51.My mom got tired because she worked all day.

52.I spend 10 minutes doing exercise.