Where are mom's keys?(这句话中的为什么要用are,不是单数吗?）

And where are Mom's keys? Where are () (they )keys Those are some keys.(改为单数） 不是说单数要用is,复数要用are吗?那为什么You are````` Now where are my keys? Where's the keys on the dresser?No,they are( )( )( ). Mom,where are my crayons? 为什么keys 后面要用is不用 are these are your keys 改为单数句 Where are his keys?用in the bag回答 where are his keys?用in the drawer回答 1:Where are the keys?( )A:It's on the table.B:They are on th