题目内容

Many students signed up for the ____race in the sports meeting .
A．400-meter-longB．400-meters-long
C．400 meters longD．400 meter long
A
考查复合形容词构词法。如果在几个词之间有破折号，那么都应该使用单数形式，如100-meter relay race100米赛跑。故A正确。句意：很多学生都报名参加运动会400米赛跑。
点评：此类构词法是比较简单的，如果有破折号连接，都使用单数形式。
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