单项选择题A.swim in public pools.B.give blood.C.over exert yourself.D.expose your skin to the sun.
单项选择题A.K10-15.B.K20-24.C.E10-12.D.F1-3.
单项选择题A.at the back of the plane.B.in aisle seats.C.in window seats.D.near to the toilets.
单项选择题A.a department store.B.a library.C.an electrical shop.D.a bus station.
单项选择题A.her bags.B.her passport and tickets.C.her children.D.her seats.