1. Who will teach _____ (us / our) English this term? Is _____ (it / he) Mr Wang?
2. Mary and her sister went to the farm with a cousin of ______ (theirs / them).
3. Every day Mr Li checks ______ (our / us) homework and corrects the mistakes we make.
4. Look! The desk has lost one of _______ (its / it's) legs.
5.-Oh! I came in a hurry and forgot to bring food.
  -Don't worry. You can have ______ (my / mine).