If a bag is filled with books and pens, it must belong to someone __________works hard.[ ]

Tomorrow is Sunday. Are you going swimming?－I’m not sure. It ______ the weather.

How many members does your club have?— There are members in my club.

I still remember the college and the teachers I visited in London years ago.

The summer vacation is coming．Do you have any ideas about the coming vacation?－I volunteering in the old people’s home．What do you think of it?