Question Detail

After driving Professor Jones to the museum she dropped him at his hotel.

After she was driven Professor Jones to the museum she had dropped him at his hotel.
After she had driven Professor Jones to the museum she had dropped him at his hotel.
Professor Jones was being driven dropped at his hotel.
After being driven to the museum, Professor Jones was dropped at his hotel.

Answer: Option D

1. We ought to have saved our environment.

Our environment ought to had been saved.
Our environment ought to have been save.
Our environment ought to have been saved.
Our environment ought to have saved.

Answer: Option C

2. Darjeeling grows tea.

Tea is grown in Darjeeling.
Tea grows in Darjeeling.
Tea is being grown in Darjeeling.
Let the tea be grown in Darjeeling.

Answer: Option A

3. Shivu is singing a song.

A song has been being sung by Shivu.
A song is sung by Shivu.
A song has being sung by Shivu.
A song is being sung by Shivu.

Answer: Option D

4. Post this letter.

Let this letter be post.
Let this letter be posted.
Let this post be letter.
Let this letter is posted.
Let this letter are posted.

Answer: Option B

5. I must help him.

He must helped by me.
I must held him.
He must get help from me.
He must be helped by me.

Answer: Option D

Explanation:

If we have "Subject + Modal Auxiliary verb + first verb + object"
then we change it to

Passive subject + Modal Auxiliary verb + be + third form + by + passive object.

Modal Auxiliary verb are : can, could, shall, will, may, might, should, would, must, ought to etc.