A.It offers worldwide flights
B.It is based in the United States
C.It holds a sale every summer
D.It sells cheap round-trip tickets
A.Less than$44
B.Between $44 and $64
C.Around $100
D.More than $100
A.Flights must begin after May 21st
B.Flights must fall between May 1st and October 1st
C.Flights must end by October l st
D.Flights must be paid for by May 1st
A.Specific
B.Favorite
C.excellent
D.common