(1)Don't play sports on the s. It's too dangerous.
(2) Helen's father didn't have enough money to buy a car so he borrowed some money from a b.
(3)—Can you see the theatre over there? —Yes, the library is o it, on the other side of the road.
(4)I went to the science m with my friends last week.
(5)Many t visit Beijing every day. They come from different countries all over the world.