---What’s wrong with you ? You look so tired. --- Last night I ________ sleep well. A. couldn’t B. can’t C. wouldn’t
--- What’s the number of students in your classroom? ---It’s about fifty. __________ of them are girls. A., Two third B. Two thirds C. Second third
— 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.