`I)`

`15` . My friend has been met by me at the beach.

`16` . I was given a pen by her teacher last month.

`17` . The floor is often swept by her every morning.

`18` . The exercise can't be done.

`19` . He was known to have stolen the car.

`20` .The questions is too difficult to be answered.

`21` . He will be able to be met by her.

`22` . The family is going to be visited by him.

`23` . The room must be swept by you everyday.

`24` . English has to be learnt every night.

`25` . Plumbing at the village must be improved

`26` . Vegetables are going to be grown in the garden by him.

`27` . Coffee used to be drunk by her at night.

`28` . Cows can be raised at Duc Linh

`29` . Has she ever been met by you ?

`30` . By whom can the exercises done?

`31` . What is being done?

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