从括号中选出适当的代词完成句子。

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).