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It is a mystery why he quit his job.

Mystery novels are loved by a lot of people.

Japanese women marry at 26 on average. It is no mystery that the birthrate is declining.

Despite the importance of sleep, its purpose is a mystery.

mystery became solved

Solve the mystery lurking behind the murder!

Love is mystery and misery indefinitely.

This mystery has a plot twist that's completely novel.

Leaving your suspicious actions I've seen a mystery - are you trying to rob me of my sleep?

Informal diction is always full of mystery and surrealism.

Many people never get it right and end up landing jobs in government. How they do it will forever remain a mystery.

Why people fall into these categories, however, is a mystery.

The mystery story is so hard that I don't like it.

One American scientist, William Keeton, used a very interesting experiment to solve this mystery.