Are you going hiking next day off?. ——If you do,_________.

How long have you been studying at this school?—I have been studying here_____. [ ]

I want to visit England _____.　　 [ ]

The number of books in the bookshop is about 10,000 and a number of them about science.

There are_________ students in my school._________ students in my school is over 5000.