This wall is made of chalky material.

He pasted a poster on the wall.

The quality of this product is very high.

This chalk is very pure, perfect for drawing pictures.

After the earthquake, a crack developed in the wall.

He pawned his watch to get money.

The content of this book is very high quality.

His favorite vase is placed in this niche.

This building is surrounded by firewalls.

I thought his plan was perfect, but in fact there were some flaws.