This is a book and that is a pencil这个句子哪错咯?想不通．．．

This is a book This is a book ( )and book is new A.an B.a C.the D./ This is a book for children ( ) Asia and its people. This is a book and book is new.An .A .The ./ Is this a book? Yes,this is. is this your book?yes,() A.this is B.it isis this your book?yes,()A.this is B.it is C.it isn't This is s book.(a book提问) This is a book答语 OK,and this is my book. 改成复数句This is a book.That isn't an egg.Is this a book?Yes,is is.Your picture is very good. 改错i think this is a good book.i don't think iti think this is a good book.i don't think it有什么错?改错 this,is,an,and,book,that,a,is,apple 连词成句 This book and this bookmark is for Mingming怎么改 用a/an填空 1 Is it( )Chinese book or ( )English book?2 This is ( )ring,and it is ( )orange ring.3 Mary is ( )English teacher.Tom is ( )Chinese teacher4 This is( )bike,It's( )old bike.5 T his is ( )telephone number6 That is ( )ID card7 I lost my ke We ( ).Look ,this restraurant is almost empty.--Just in case.A,need't have booked B ,need to book C,didn't need book D,must book this book isn't ().() book is over there.A.your,your B.yours,your C.yours,yours This is a book.对a book进行提问 This book is Bob's.That book is John.These books are_____.如题,A.Bob's and John'sB.Bob's and JohnC.Bob and John's