This is a orange book.填a对不对

This is a orange book.填a对不对 Is this a( )orange的括号里该填什么 This book is （——）orange.It‘s（——）orange book.有四个选项,分别是/ ,a /, This is a book This is a ( ).The orange is in it is orange. This is a orange.It’s an orange.是否正确. 用a,an填空.1.This is( )book.2.That is（ ）orange.3.It is ( ) Engl Is this a book?" "Yes,this is." this is a book 提问 This is a interesting book This is (a math) book. This is s book.(a book提问)