His arrogant attitude irritated me.

In organic chemistry class, I learned about the reactions of octyne.

He built a fish pond in his backyard.

It's hard to acknowledge that fact.

He and I share a lot of things.

He is the most suitable person for this matter.

She talked about her worries to her friend.

He is swamped with office work every day.

He made even more effort to solve the problem.

More importantly, we have to prepare for tomorrow's meeting.