Question Detail

My mother is cooking food.

Food is being cooked by my mother.
Food has been cooked by my mother.
Food was being cooked by my mother.
Food is being cook by my mother.

Answer: Option A

1. Turn her out.

Let her be turned in.
Let his be turned out.
Let her be turned out.
Let her turned out.
Let her be turn out.

Answer: Option C

2. Please give me a pen.

You are ordered to give me a pen.
You are ought to give me a pen.
You are requested to give me pen.
You are requested to give me a pen.

Answer: Option D

Explanation:

Whenever sentence starts with please or kindly, then in passive voice we use "You are requested to"

3. He arrived at the conclusion.

The conclusion was arrived at by him.
The conclusion arrived at by him.
The conclusion had arrived at by him.
The conclusion have arrived at by him.

Answer: Option A

4. 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.