What should come in place of the question mark (?) in

  Select the correct passive form of the given sentence.

Doctors are constantly monitoring the condition of the patient

Choose the correctly spelt word.

The rise and fall in the pitch of a voice

Select the most appropriate option to replace the bold word in the given  Sentence.

Choose the option that is the passive form of the sentence.

They considered it an impressive building.

Select the correct PASSIVE VOICE form of the given sentence.

The floods destroyed several crops.

Select the correct active \passive form of the given sentence.

My pens have been stolen.

Choose the option in which the given sentence has been changed into passive voice

I wrote this book

Choose the best way to complete these passive voice sentence 

Nothing _____ me,