What is this怎么回答,是It is+a/an

What is this怎么回答,是It is+a/an What is it还是What is this回答是：It is a baseball. what's this?回答是既可用It's a...还可用This is a... What color is this apple?回答是It's green还是It's a green apple what is this和what is that的回答与区别 what are they和what are these/those的回答与区别.是this is /that is.还是it is /it's是they are these are /those are What day is it today?怎么回答 what day is it today怎么回答 what date is it today怎么回答 what day is it?怎么回答? what day is it tomorrow怎么回答? what is it like怎么回答 what day is it date怎么回答 what's this in English?怎么回答?可以用this 还是只能用It is 还有Who is that?是要用he/she还是it回答 what color is this pen的回答可不可以是It's a red pen Is this/that your uncle?怎么回答?是Yes,it is还是Yes,he is. 为什么What is this?What is that?以及What is it?都只能用It is来回答. what is that in english怎么回答?是that is .还是It is. what is that?怎么回答?是that is……还是it is……?