Wearealwaysrequiredtowrite——composition.A.aone-hundred-and-twenty-wordB.aone-hundred-twenty-wordC.one-hundred-and-twenty-wordsD.one-hundred-and-twenty-word是A么?还有请说明加-连成形容词的相关用法

　　Wearealwaysrequiredtowrite——composition.

　　A.aone-hundred-and-twenty-wordB.aone-hundred-twenty-wordC.one-hundred-and-twenty-wordsD.one-hundred-and-twenty-word是A么?还有请说明加-连成形容词的相关用法