--- ________ the teacher’s office? --- It’s _____ the second floor.A. Where’s; in B. Where’s; on C. Where; on
We can see ____ flowers everywhere. A. a lot B. lots of C.lot of
The girls often go ____ on the weekend.A. shop B. shoping C. shopping
My parents always go to work_____7:20 a.m. A. in B. on C. at
I often play ping-pong ________ my friend.
___________ is the first month of a year.