Which statement does not describe people's interactions with the environment? The ways that people alter the environment can be
both harmful AND beneficial. Population growth and the environment are related. People adapt to their environment. The environment is seldom affected by technological advances.
She <span>had been working</span> on the project for 2 days before she finished it. So B is the only right one as it's a continuous action before an action with an exact defining past perfect continuous. Also there's a key word "for" that can help us to find out the tense.
