( C )1.Classes begin _______seven fifty-five.
A.in B.on C.at D.for
( C )2.I want______a map of China.
A.buy B.is buying C.to buy D.am buying
( A )3.Who's the lady_____biue?
A.in B.on C.at D.with
( B )4.We usually stay______home______Saturday afternoon.
A.at;in B.at;on C.in;at D.on;on