5. must be hard to live on your salary

Để sống bằng mức lương ấy chắc hẳn khó khăn lắm.

-> Chắc hẳn khó khăn lắm để sống bằng mức lương ấy 

6. plays better than Tom

so sánh hơn với tính từ good - better - the best

7. is interesting enough to be read

Thật thú vị khi đọc cuốn sách này

-> Cuốn sách này đủ thú vị để được đọc

8. who was injured in the accident is now in the hospital

who là đại từ quan hệ thay thế cho danh từ chỉ người

5. To live on your salary must be hard.

=>It must be hard to live on your salary.

6. Tom is the best player in the team.

=> No one in the team plays better than Tom.

7. It’s interesting to read this book.

=>This book is interesting enough to be read.

10. A boy was injured in the accident, he is now in the hospital.

=>The boy who was injured in the accident is now in the hospital.

cho mình xin ctlhn nhé