--What is that on the table?  --Oh, a set of ___________ on the table.

Look, the Maths teacher with his students _________on the grass to have a good rest at present.

We collected a lot of books to get the necessary information but only half _________helpful, so we failed to finish the work. 

____ you Kate Green? ---No. My name _____Jane

 There _____a book and two pencils on the desk.