1.My sister is studying hard in order getting scholarship at university
-to get (in order+to V)
2.John said he was not interested in work for a large company
- be (interested in+V-ing)
3.I am agree with you,we must practice more if we want to speak well
- don't (agree là động từ nên dùng don't)
4.Mary and her sister studied biology last year,and so does Jean
- did (có "last year")
5.Let him put the coffee table on the middle of the room
- in (in the middle of the room: ở giữa phòng)