15. This is Paul. His mother is my aunt. I’m his ______________.

14. Mary is my sister and I’m her __________.

13. He is my father, but I’m not his son. I’m his _____________.

12. This is Susan. My father is her son. She is my ___________.

11．My father and mother are my ________________.

6. friend _________ 7. box___________ 8. watch ________9. family______10. boy______

B)　　 用适当的单词完成下列句子。

A)　　 写出下列单词的复数形式、

1．this　 ________ 2. that __________ 3. it_______ 4. he_________ 5. brother ________