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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
考查復(fù)合形容詞構(gòu)詞法。如果在幾個詞之間有破折號，那么都應(yīng)該使用單數(shù)形式，如100-meter relay race100米賽跑。故A正確。句意：很多學生都報名參加運動會400米賽跑。
點評：此類構(gòu)詞法是比較簡單的，如果有破折號連接，都使用單數(shù)形式。
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