1, they must do their task now
-> Their task must be done now
2, He expected me to buy him a book
-> he expected to be bought a book by me
3, They want him to invite them to the party
-> they want to be invited to the party by him
4, they opened the road 10 years ago
-> the road was opened 10 years ago
5, he can mend all chairs for you now
-> all chairs can be mended for you now
6, we expected them to forgive us
-> we expected to be forgiven by them
7, they allowed women to vote many years ago
-> women was allowed to vote many years ago
8, you should open the wine 3 hours before you use it
-> the wine should be open 3 hours before you use it
9, they suggested making the test easier
-> they suggested the test should be made easier
10, people think she is the most beautiful girl
-> she is thought to have been the most beautiful girl