these are my grandfather and grandmother 改成单数形式 快

These are my friend These are ()() my books. these are my feet . These are my grandparents. These are my b____ friends. these are my shoes 同义 these are you to my these are my trousers(对my提问) these are my books对my提问 These are my glove.对my提问. These are my sister给my提问 these girls are my cousins. -------these girlsthese girls are my cousins. -------these girls they are my friend和these are my friend改错 These are my pens同义句 These pens _______ These are my grandparents用this代替these These are my brothers改为一般疑问句 these are my oranges(改为单数句式) These are my friends的意思是什么?