Anna is not my sister. __ my cousin.

I like this pair of jeans very much. Can I try         on?

------Would you like to eat up all the food on that plate? ------Sure,but that is not _______. I have already eaten all my food up.

An old friend of my sister's always helps my brother and      with      English.

—Who’s that?—My sister. ______ works in a factory.