whose的提问是不是只能用it's.回答,可不可以用this is.回答

what's this in English?怎么回答?可以用this 还是只能用It is 用Is this 提问的选择疑问句为什么用It is 回答,而不能用This is回答 --whose watch is this ?---【 】,回答为什么不能是this is lucy‘s 而是it is what color is this pen的回答可不可以是It's a red pen Whose cap is it的回答, whose handbag is it?的回答 如何回答 Whose is this what's this?的回答为什么是it's… 为什么不用this is…回答 Who's this用this is回答还是it is回答 Is this/that---?是否能用Yes,it is.来回答? Whose guitar is this?类似于这种的疑问句怎么回答? Whose pen is this?It’s _____ (我的).Whose pen is that?It’s ___