All the students are talking and laughing in the classroom and it’s______ .
— Jane, is this your dictionary? — Yes, it's . Thank you. A. me B. myC. mine
---What _____ useful book! And ______ book is popular with students. A. a, a B. a, the C. the , the
How dirty your rooms are! You need to ___________.
_________ her mother, she became a famous scientist.
The dog had _____ serious toothache so its owner took it to _____ animal doctor.