Verified answer

I had just eaten when he arrived.

Had I just eaten when he arrived? - общий

Who had just eaten when he arrived? - вопрос к подлежащему

I had just eaten when he arrived, hadn't I? - разделительный

What  had I  just done when he arrived? - специальный

Had I or she just eaten when he arrived? - альтернативный

It was raining heavy and the wind was howling.

Was it raining heavy and the wind was howling? - общий

When was it raining heavy and the wind was howling? - специальный

Was it raining or snowing heavy and the wind was howling? - альтернативный

It was raining heavy and the wind was howling, wasn't it? - разделительный

общий

1. Had I just finished eating when arrived?

специальный

2.  When had I just finished eating?

к подлежащему

3. Who had just finished eating when arrived?

разделительный

4. I had just finished eating when arrived, had not I?

общий

1.Was it raining heavily and was the wind howling?

специальный

2. what kind of rain and wind were there?

к подлежащему

3. What was howling during the rain?

разделительный

4. It was raining heavily and the wind was howling, wasn't it?