People were pulling down the old buildings at that time.(改为被动语态)The old buildings ___ ___ ___ ____ by people at that time.

问题描述:

People were pulling down the old buildings at that time.(改为被动语态)
The old buildings ___ ___ ___ ____ by people at that time.

were pulled down

The old buildings (were) (being) (pulled) (down) by people at that time.