Do you know the boy________ is sitting next to Peter?-Yes. He is Peter’s friend. They are celebrating his ________ birthday.

Do you have _____ trouble finishing the work?—The work is not so difficult as you think． We have finished it already．

Where is Grace?–She _____ in the yard.

Millie could look after _______ though she was only five years old.

Nobody helps Mary _____ Lynn. [ ]