The conclusion of his research was that this problem is unsolvable.

Please look at my schedule.

The earth's atmosphere provides the oxygen necessary for us to live.

The Earth's exosphere is located at the boundary with space.

He is an expert in teratology, studying the strange forms of organisms.

She is planning a date with her current boyfriend.

He lost everything.

My boyfriend gave me a gift.

Everyone was surprised by the news.

Please avoid this road because it's dangerous.