---There is a river the two citiesthe river there is a bridge. A. in In B. between

问题补充：

---There is a river the two cities.

--- the river there is a bridge.

A. in, In

B. between, Over

C. between, On

D. outside, Under

答案：

A. in, In

(答案→)B. between, Over

C. between, On

D. outside, Under

解析：句意：在两个城市之间有一条河流。在这条河流的上方有一座大桥。Between表示“在......之间”；over表示“在......的正上方”；故选B。