помогите переделать предложения из Passive Voice в Active Voice

здесь не присутствует ни одного "совершателя действия" так сказать. так что переделать невозможно. но если добавить немного фантазии-то вот.
1) she washed and ironed her dress
2)Teacher looked through and corrected the papers by the next lesson.
3) Constructor built this house last year.
4) He sent the letter just now.
5) I had no blame for the mistakes. или They didn't blame me for the mistakes

Так производителя действия не имеется, будем придумывать сами; -)
1. Her dress was washed and ironed. - She washed and ironed her dress.
2. The papers had been looked through and corrected by the next lesson - The teacher had looked through the papers and corrected them by the next lesson.
3. This house was built last year. - (The) Constuctors built this house last year.
4. The letter has just been sent. - The secretary has just sent the letter.
5. I was not blamed for the mistakes. - It wasn't my fault in making the mistake.

во втором варианте (у Екатерины) правильно, кроме второго предложения- вместо настоящего перфекта используй прошедший.

She had her dress washed and ironed. (or They washed and ironed her dress)
They have looked through and corrected the papers by the next lesson.
They built this house last year.
They have just sent the letter.
They didn't blame me for the mistakes.