[     ]

A. Lucy's and Lily's         
B. Lucy's and Lily             
C. Lucy and Lily's           
D. Lucy and Lily

[     ]

A. my mother friend
B. a friend to my mother
C. a friend of my mother's
D. friend of my mother

A. forty minutes's walk      
B. forty minutes' walk           
C. forty minutes walk       
D. forty minute's walk

A. teacher  
B. teacher's
C. teachers  
D. the teacher's 

A. Jim and Mary                 
B. Jim's and Mary
C. Jim and Mary's               
D. Jim's and Mary's

[     ]

A. minute's
B. minute
C. minutes'
D. minutes

　　A thick storm of sand(沙塵暴) turned Beijing        1.________
sky into blue last Wednesday.Cars drove with               2.________
lights on.School child walked with their shirts,              3.________
coats and anything else cover                                         4.________
their nose.Some women wore scarves(頭巾)                 5.________
over their heads when the storm become stronger.         6.________
"Sand can be sweeping into the air when there               7.________
is a drought(旱災).Too much trees have been cut           8.________
this years.It made the sandstorm problem worse.            9.________
So something must be done to keep the air nice or          10.________
clean," said the scientists.

A. in people’s homes        
B. in people homes        
C. at people's homes        
D. at people homes

A. child      
B. children's       
C. children      
D. childrens'

A. three hours' drive          
B. three hour's drive
C. three hour drive