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?

2 How is this computer switched on?3 What is  made with flour?4 How often these rooms are cleaned?5 Where coffee beans are grown?6 When the post is delivered?7 How this word is pronounced?8 How much are known about dinosaurs?