______the man is rich,________is not happy.

They became friends again that dayUntil then, they _____ to each other for nearly two years

He made no preparation for the job interview in advance, which might_____ his failure in it.

．People like taking photos because photos are the _______ of youth and history and can remind us of many happy scenes.

The cost of organic food is higher than _____ of conventional food because the organic price tag reflects more closely the true cost of growing the food．