Are these cars?作肯定回答

Are these cars?作肯定回答 Are these toy cars 做肯定回答 Are these his pictures?作肯定回答 Are these your sisters?（作肯定回答） Are these toys yours?（作肯定回答） Are these your lunchboxes.（作肯定回答） are these/those your rulers?(作肯定回答) Are these English dictionaries?作肯定回答 _________,they_________ are these 做肯定回答 Are these cars or buses?回答 These are nice pictures.变为一般疑问句,并作简要的肯定回答和否定回答 Are these keys in the drawer?(作肯定和否定回答)