实力测验——21页

一、

1．○

2．○

3．×

4．○

5．×

二、

1．families

2．children

3．policeman

4．glasses

5．bread

6．sisters

7．cats

8．potatoes

9．watches

10．leaves¹

三、

1．milk

2．Tom's

3．cups

4．Tom and Mary's

5．piece of

6．an

7．sheep

8．radios

9．boys

10．father's

四、

1．These are knives．

2．Those are tomatoes．

3．We have wishes．

4．Those children are very lovely．

5．Englishmen² stood³ there．

五、

1．a sister's

2．a boy's

3．a baby's

5．a camel's

6．men's

7．birds'

8．two days'

9．John and Mary's

10．John's and Mary's

六、

1．the boy's leg

2．the girl's key

3．the cat's tail

4．my father's friend

5．the boy's toys

6．the birds'

7．the queen's servants⁴

8．the men's shirts

9．the girl's violin

10．John's pen