I will attend my friend's luncheon party tomorrow.

I eat lunch every day at 12 o'clock.

He attacked the enemy using a shrapnel.

He entered the forest with a shotgun.

Phosphorous acid plays an important role in chemical reactions.

Sulfurous acid is often used for food preservation.

Nitrous acid plays an important role in chemical reactions.

I was able to complete this project because of your help. Thank you.

It is said that bandits used to live in that mountain long ago.

We reached the summit of the mountain.