Viết dạng đúng của động từ trg ngoặc
The library(open) at 7 am and (close) at 4.30 pm.Miss Hong(be) our librarian. She (be) in the library at the moment. Some students (borrow) books.Others(sit) at the tables in the middle of the room and (read) books.She(help) students to find the books they want. The librarian (work) hard at the moment