问题
________ the river there is ______bridge.
A:On; a 90-metre-long
B:On; a 90-metres-long
C:Over; a 90-metre-long
D:Over; a 90-metres-long;
B:On; a 90-metres-long
C:Over; a 90-metre-long
D:Over; a 90-metres-long;
正确答案是：
