His house is very big.

We like to walk in the forest on weekends.

His irresponsible behavior damages the team's morale.

He failed to keep his promise.

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

My younger brother is good at arithmetic.

This area is filled with beautiful mountains and rivers.

Forests are being greatly damaged due to acid rain.

The room was piled high with books.