— YOG (青奥会) comes _____summer?
— Yes. And the 2nd YOG starts in Nanjing _____August 16.
| A．in; on | B．on; on | C．at; on | D．on; in |
—Where is your key?
—___________.
A. Yes, it is
B. They are here
C. It's in the drawer.
The apples are _____ the tree, and the birds are _____ the tree.
A. in; on B. on; in C. in; in
Call Mary____ 333-6241,
A. at B. to C. in
____ do you spell "photo"?
A. What B. How C. Who
— Are these your books?
—No, they aren't. They're____.
A. her B. his C. mine