The race is­_______long A 1500 metres B 1500-metre C 1500-metres D 1500 metre答案是A那位好心人帮解释下为什么不是B

问题描述:

The race is­_______long A 1500 metres B 1500-metre C 1500-metres D 1500 metre
答案是A那位好心人帮解释下为什么不是B