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i dont

4 Her purse was stolen

5 The unidentified objects was seen last night

6 Their room was found in disordered arrangement

7 All the ancient constructions were distroyed by the war

8 His plate of food was dropped onto the floor by thu's young brother

9 The students were given a difficult arithmetic problem

10 Some comics books were bought for Lan's brother by her

Has he been met before?

Why wasn't that song sung by her?

Is the letter sent?

Who was this speech made?

How was it carried home?

All the books you need are found

She was heard to come in 

He was allowed to go by her

It was said that he had gone

It is thought that he is a famous doctor

A lot of tea is drunk in England

That prevention is believed to be better than cure

4. The grass will be cut tomorrow.

5. Was the class window broken by Nam yesterday?

Are emails typed everyday

16 The engine of the car has to be repaired 

17 The window was broken and some pictures were taken away by the boys

20 A cake is being cut with a sharp knife by Mary

all travel expenses must be paid by employers for this training course

Where will you be sent by your company next year?

I am not impressed by susan's knowledge

People's breathing was being affected by the population in this town