7.--- How did you find him out ?---- I _____ his name by chance on a list.
The cost of oil is less than _______ of gas.
He is too careless and he _______ keys.
Please write your composition ________ line to leave space for the teacher’s correction .
_______ are the days when the teachers were looked down upon .
Mr. Wang was such a good teacher _______ the students love and respect.