Passive and active form

is this sentences in active or passive form (voice)?

The cat eats the mouse

• active voice

• passive voice

• both answer are correct

• not sure

–The past cannot be changed.

Write the above statement in passive voice

The teacher explained the students the experiment.

Change the above statement into passive.

These video ads ______________on major websites such as newpaper sites or TV channels.

• are posted

• are posting

Over 12 % of all videos that ______________online are video ads.

• are being viewed

• are viewing

Nowadays, more and more companies _________video ads to boost their online identity.

• are being used

• are using

The correct passive sentence for the following is

I teach English and Mathematics.

• English and Mathematics are taught by me.

• English and Mathematics were taught by me.

• English and Mathematics have been taught by me.

• English and Mathematics had been taught by me.

Instead of traditional interviews,video interviews___________by more and more companies these days.

• are using

• are being used

–Alternative sources have to be used by us to tide over the energy crisis.

The verb used in the above passive statement is

• Simple Present

• Present perfect

• Simple Past

• past perfect

The teacher explained the students the experiment.

Change the above statement into passive.