it is red 成分

red 有名词和形容词的词性 且是不可数名词
It is red.

这里的RED 是什么词性呢 还是两者兼可

it is a really red letter day () is your pen? it's red . This is my sweater.It is a red.哪里有错误 Is it in that factory ------"Red Flag'' cars are produced? 30. Is it in that factory __________ “Red Flag” cars are produced? Youth is not a time of life , it is a state of mind, it is not a matter of rosy cheeks, red lips .. why apple is red why Jupiter is red? it is quite difficult for me to pass the exam中的for me 是什么成分呢 (2)What is under the desk?__.A.It is a football B.I can see a set of keys C.They are red box