they are old computers改为单数形式

they are old computers改为单数形式 They are old women.(改为单数形式） They are old jeeps. (改为单数句) they are English books.(改为单数形式) They are his friends改为单数形式 They are Chinese【改为单数形式】 are they apples?改为单数形式 they are your sons改为单数形式 they are nurses改为单数形式 改为单数形式They are women teacher? They are English cars.(改为单数形式) are they american students?改为单数形式