The police believe that all these incidents were committed by the same criminal.

He is in the same position as his friends.

I enclosed the invoice in the envelope and sent it.

Her eyes were a beautiful amber color.

I recently met a middle school classmate of mine on the train.

Dynamic stretches and static stretches

Alkaline earth metals are one of the main components of the earth's crust.

Looking up at the Big Dipper, I feel at peace.

He was diagnosed with schizophrenia.

He is an expert in molecular biology.