My house burned down completely last night.

He was on the verge of despair.

I have been to South Jeolla.

Since my grades in the first semester were not good, I have to work harder in the second semester.

He was hiding his criminal record.

He is applying his experience from his former post to his new job.

That news made the whole school noisy.

All lines have been resumed operation.

Natural selection plays an important role in the evolution of organisms.

On the eve, he studied all night for the exam.