What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don’t’ know _______ of them.

Though he is still a child, he has already read _____

When was your cousin born?—____ May 16, 1992.[ ]

There are_________ floors in this shopping mall. KFC is on the_________ floor.

Do you know the answer ______ question? [ ]