How many students are there in your school?－_________the students in our school_________over two thousand.

Will you be back _____ five in the afternoon? — I am not sure, maybe later than that.

Scientists say it may be five or six years_______it is possible to test this medicine on human patients.

What’s on? — The lady there ___________ me of my English teacher. Her smile is so sweet.

Kate is ______ the computer.[ ]