They aren' (I) books. They're (Lily and Lucy).用所给单词的适当形式填空.

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Theyaren''______(I)books.They''re______(LilyandLucy).用所给单词的适当形式填空.Theyaren''______(I)books.They''re_____

They aren'______ (I) books. They're ______ (Lily and Lucy).用所给单词的适当形式填空.
They aren'______ (I) books. They're ______ (Lily and Lucy).
用所给单词的适当形式填空.

They aren'______ (I) books. They're ______ (Lily and Lucy).用所给单词的适当形式填空.
my,Lily's and Lucy's

my Lily and Lucy's

my
Lily and Lucy's