Question Detail

They may win the battle.

The battle may be win.
The battle may be won.
The battle may be won by them.
The battle may won.

Answer: Option B

1. 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

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. The farmer was ploughing the fields.

The fields was being ploughed by the farmer.
The fields were being ploughed by the farmer.
The fields were ploughed by the farmer.
The fields were being ploughed by farmer.

Answer: Option B

4. Someone has stolen his book.

His book is been stolen.
His book has been stolen.
His book is stolen.
His book has stolen.

Answer: Option B

Explanation:

Apart from Rule to make active voice of Present Perfect Tense, which is

Passive subject + has/have + been + third form of verb + by + passive object

Please also note that words like, "someone", "somebody", "people", "police", "public" etc are dropped. But in rare cases we can use them if sentence meaning is not clear.