Are those yellow bikes old?（改成肯定句）

Are those yellow bikes old?（改成肯定句） Those are old libraries.改成单数句 Those are old yellow shirts改为单数句 Are those banana trees?改成肯定句和否定句 Are those nice pictures yours?改成肯定句 Are those crayons hers?(肯定句） Are those bananas yellow?（同义句转换） Are those ____________ ____ those are yellow flowers 同义句 those are yellow kites 同义句 those　bikes　are　not　　theirs,改同义句 Are those flowers yellow.(加上trees改成选择疑问句) Are those teachers very busy now?怎么改成肯定句?顺便说一下中文.