Are those apple?No,[they these their]

Are those apple?No,[they these their] what are those that're Apple Those are ——A apple trees B apples trees Are those apple?这句话有什么错? 句型转换：Those are apples(单数句)(句型转换：Those are apples(单数句)( )apple. Are those ---trousers?No,---are not ---.---are blue.(they) Are () apples?No,() are orangesA that itB those theyC that they D those those What are those?- ______.A.They are apple trees B.Those are apple trees为什么不选B而是选A,这是语法规定还是习惯用法? Are these your apple?Yse,().A.those are B.these are C.they're D.they are 麻烦回答一下1.is ( )a book?回答是No ( )is notA.this,this B.that,that C.it,this D.that,it2.What is this( )English?it is ( )egg.A.in/ B.to ,an C.in,an D.on,a3.What are those?( )apple.A,Those are B.these are C.They are4.How do you spell( )name? Are those ( A apple tree B apples tree C apples trees我认为是c Are those your parents?No,___ ____.作否定回答 Are those dogs his?No,they don't.【改错】 Are those your friends?A.Yes,they're B.No,they are C.Yes,they are D.Yes,those are —Are those her parents?—_____.A.Yes,those are B.No,those aren't C.Yes,they are D.No,these aren't What are those?___A.they are apple trees B.they are apples trose are apples c.those are apple trees答案是A不过为啥不能选C呢 Those that have gone won't come back again.Those coming back are no longer perfect. A those Ben's pencils? No,those are mine.错在哪里?