1) rewrite the sentences in passive voice. i can answer the question. - she would carry the box. - you should open the window. - we might play cards. - you ought to wash the car. - he must fill in the form. - they need not buy bread. - he could not read the sentence. - will the teacher test our english? - could jenny lock the door? –

The question can be answered by me. 
The box would be carried by her.
The window should be opened by you.
Cards might be played by us.
The car ought to be washed.
The form must be filled in by him.
Bread need not be bought by them.
The sentence couldn`t be read by him. 
Will our English be tested by the teacher?
Could the door be locked by Jenny?