1.This is my sister.改为复数句2.That is my friend.改为复数句

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1.These are my sisters.
2.Those are my friends.
this复数these 这些
that复数those 那些

1.This is my sister.改为复数句2.That is my friend.改为复数句 This is my sister 改为复数句七年级英语This is my sister（改为复数句）That is my friend（改为复数句）this,Bo That is my sister.(改为复数句） she is my friend (改为复数句) He is my friend.改为复数句 It is my friend.改为复数句. This is my cousin.(改为复数句) That is my dictionary 改为复数句 that is my eraser 改为复数句 This is my sister.改为复数形式、 That is my sister改为复数形式