47. A new house is going to be built next year.

 - Bị động thì tương lai gần: S + is/am/are going to + be + P2 + by...

48. Lan said she would visit HCM City for a week.

 - Reported speech lùi thì: will `->` would

49. In spite of having a good salary, he was unhappy in his job.

 - In spite of/Despite + Noun/Noun phrase/V-ing: Mặc dù....

Note: In spite of/Despite + V-ing khi chủ ngữ ở hai vế là một

50. I wish i hadn't missed/ had remebered your birthday party

 - Cấu trúc Wish ở quá khứ lùi thì `->` quá khứ hoàn thành

47 A new house is going to be built here next year.(passive:be+PP)

48 Lan said she would visit Ho Chi Minh city for a week.( reporter: future(will)→ future in the past(would))

49 In spite of having a good salary,he was unhappy with his job. ( although+S+V,S+V→ Despite/in spite of +Ving,S+V)

50 I wish I hadn’t missed your birthday party.(S + wish(es) + (that) + S + had + V3→nuối tiếc về một việc không có thật ở quá khứ)