His attack was very powerful.

His research made a significant contribution to the scientific community.

His resistant attitude was a big problem for his parents.

I go to the bank every Friday.

My great-great-grandmother lived a very long life.

The sunlight poured into the room, making it very bright.

My schedule has changed.

This epidemic is spreading all over the world.

I couldn't understand his actions.

He is majoring in mineralogy at university.