These tools are useless now,_____ A.are they B.aren’t they C

These tools are useless now,_____ A.are they B.aren’t they C 19.These tools are useless now,_____ 反问部分是什么 单项选择 —Are these ___ books?—No,they aren't _____.A、your;us B、 —____you bags?—No,they aren't A.Are these B.Is this C.what i ——Are these ( ) —— No,( ) a.bananas;they aren't b.two banana Whose cakes are these They are （ ）,they aren't （ ）.A his min They are walking,______ ______?( ) A.are they B.aren't they They ____ jump,swim and sing,too.A.are B.can C.aren't D.can' They aren't our books. Are they____? A. your B. his C. her D Are these your books?yes,they are.\No,they aren't they're he These are your books,aren’t they?怎么回答 Are these your ______ trousers?No,they aren't ______.