What is red?如何回答

What colour is the dress?(用red回答） “what is up?”如何回答? 如何回答what is your house like? what is going on如何回答? what color is your ( )?如何回答? what is his nationality 后面如何回答? What is wrong with you?如何回答 如何 回答what is it made of what is he like如何回答 what is the red fish what color is this pen的回答可不可以是It's a red pen My skirt is red(对red提问).What ( ) is ( ) skirt?