Many students signed up for the ________ race in the sports meeting to be held next week．
A.800-metre-long
B.800-metres-long
C.800-metres-length
D.800-metre-length
网友回答
A解析此处要表达“800米赛跑”，因为用了连字符，所以这部分的作用相当于形容词，metre后不应该再有复数形式；另外，long本身是形容词，可以用来修饰名词，就不再用名词length了。