3、Must she do the extra homework at once?
（Must） the extra work （all be done） at once by （herself）?
4、When did they make these cars?
When （were） these cars （made）?
5、My uncle gave me some English books.
Some English books （were given to） me by my uncle.
I （was given） some English books by my uncle.
6、Has she swept the floor yet?
（Has） the floor （been swept） by her yet?
7、She showed us her color photos just now.
Her color photos （were shown to） us just now.
We （were shown） her color photos just now.
8、My teacher had corrected those exercises teacher before the lesson.
Those exercises （had been corrected） by my teacher before the lesson.
9、The boss always makes the workers do the extra work.
The workers （are） always （made） do the extra work by the boss.
11、Do the young people usually listen to pop music?
（Is） pop music usually （listened to） by young people?
12、The policeman saw a thief rush into the bank.
A thief （was seen to） rush into the bank.