What's this?的答语：It's A.和It's an "A"以及It's an A．哪个正确?

What's this?的答语：It's A.和It's an "A"以及It's an A．哪个正确? What`s this in E( ) It`s an a ( ) 选择 What's this - ( )"A" A.It's B.It's an C.It's a D.This is what's this?it's an apple. it's a green apple. 1.What's this? It"s（）orange. It's（）orange A.an,an B.an,/ C./ This is a orange.It’s an orange.是否正确. 填a还是an What's this?It's_______apple. What's this in English?It'( )apple.A.an.B.a.C.不填 选哪个? It's an orange和It's a jacket中an和a的区别 -What's this?-It's a-------. What's this?It's( ) UFO.A.a B.an C.the D./ What's this?It's （ ）"h".A.a B.an C.the D./