Сделайте в Passive Voice:

1) The teacher explained this rule twice

2) they do not grow fruit in this part of this country

3) they have designed new scenery for the party

4) they laughed at her because of her hat

5) we have already sent for the doctor

1) The teacher explained this rule twice

This rule was explained twice by the teacher

2) they do not grow fruit in this part of this country

in this part of this country isn’t grown fruit

3) they have designed new scenery for the party

new scenery for the party has been designed by them

4) they laughed at her because of her hat

she was laughed by them because of her hat

5) we have already sent for the doctor

the doctor has been already sent for