— Why must I wear my school uniform, mom?— Because you are a student. You are _________ to wear your own clothes to school.
Our teacher told us____an electric bike.It’s too dangerous. A.to ride B.not to ride C.not ride
—Why didn’t you ask me to help you with your work? —You are so busy. I won’t ___________ much of your time. A. take up B. take off C. take to
The number of the students in our school____about 1000 and a number of them____boys. A. are ;is B.is;is C.is;are
The book is worth____. A. to read B.reading C.read
The river has become much ______ than before because of the waste water from the factories. A. dirty B. dirtier C. Dirtiest