用适当形式填空this,who,they,be,friend

问题描述:

用适当形式填空this,who,they,be,friend
(1)are those your brothers?
yes,()are.
(2)her mother()a doctor.
(3)my()are in beijing now.
(4)()are my sisters and that‘s my brother.
(5)()is the boy?he is my brother,jim.

1.they 2.is 3.friends 4.These 5.Who