Write questions in the passive.1. what/ this machine / use for2.how

Write questions in the passive.
1. what
/ this machine / use for


2.
how / this computer / switch on


3.
what / make / with flour


4.
how often / these rooms / clean


5.
where / coffee beans / grow


6.
when / the post / deliver


7.
how / this word / pronounce


8.
how much / know / about dinosaurs
Например: 1. What is this machine used for?