根据要求完成下列各题
Is that your ruler ?（作否定回答）
________，________ ________．
This is my book .（改为复数句型）
________ ________ my ________．
Those are my pens.(改为一般疑问句)
________ ________ your ________？
These are her keys.(改为同义句)
These ________ are ________．
is my watch.(改为一般疑问句)
________ ________ your watch ?
This is an orange.（对划线部分提问）
________ ________ this ?
These are apples. （改为单数句型）
________ ________ ________ apple.
Are these your cousins ? (作肯定回答)
Yes, ________ ________．