That is the cook ______ came from London.

  Has everything __   ___ can be done ___   ___?

One of the most interesting places in Yangzhou ________ are often visited by foreigners is the West Slender Lake.

—Why do you call him Mr．Knowledgeable?— Because he knows almost everything        we want to know．

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