来自刘亚擎的问题
-WhatwillyoudoonMayDay?-Wehavea___holday,sowe'llgoforatrip.A.threedaysB.three-daysC.three-day选什么?
-WhatwillyoudoonMayDay?-Wehavea___holday,sowe'llgoforatrip.A.threedaysB.three-daysC.three-day选什么?


-WhatwillyoudoonMayDay?-Wehavea___holday,sowe'llgoforatrip.A.threedaysB.three-daysC.three-day选什么?
-WhatwillyoudoonMayDay?-Wehavea___holday,sowe'llgoforatrip.A.threedaysB.three-daysC.three-day选什么?
选C
注意只要看到两词间有横杠的,那么这里的名词不能用复数。
因为它代表一个形容词
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