Be quiet, boys and girls! It’s time for class. __________ Unit 3 in your books.
——Are these your cousins? ——_________. They are my sister and brother.
Please e-mail Jack _____ jacksmith@sina.com.
The girl ________ is my friend. Her name is Lily.
_______ Alice and Bob? They are my classmates.
——Is this Helen's blue hat? ——No. It is _________ hat. _________ is yellow.