--- _______city is the capital of China?---Beijing is .

 Lily and Grace are my best friends. ________ of them are very smart.

_____you do, don’t miss this exhibition, for it’s so hard for me to get the tickets. 

. A: Whose shirt is this? Is it Tom’s? B: No, it isn’t. ______________ is white.

--Did you see Mary and her sister this morning?-- Yes, I saw _________ girls playing in the playground.