There _______ a pen and some pencils on the desk.

There ______ lots of sheep and pigs on my uncle’s farm now.

– A number of students ____ in the dinning hall.-- Let me count. The number of the students ____ about 400.

I think you must be mistaken about seeing him at the theatre; I’m sure he       abroad all week.

The number of traffic accidents that _______ in developing countries _______ increasing.