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．leaves

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．Englishmen stood 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 servants

8．the men's shirts

9．the girl's violin

10．John's pen