She/ think/ read books/ interesting/ useful.51/58She/ think/ read books/ interesting/ useful.She think reading books is interesting and useful.She think read books is interesting and useful.She thinks reading books is interesting and useful.She think reads books is interesting and useful.Giải thíchĐáp án C Cấu trúc thì hiện tại đơn. Dịch: Cô ấy nghĩ việc đọc sách thì thú vị và có ích.