All of us went to the park _______ Bob. He had to look after his sister at home.
Yesterday the teacher told us that the earth ________around the sun.
All the students went out ____ Zhao Ping after class.
Mrs Smith eats ___________ meat, so she is ___________ fat now
Peter is ten years old. He is ______________ to go to school.
There will be _______________ pollution this year than last year.