价格是价值的货币表现，商品的价格与价值成正比，与货币的价值成反比。
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Which one is NOT important in dealing with the stress?
A. Do exercise and have a good diet.
B. Have a good sleep.
C. Talk to someone.
D. Make time for fun.
Which one is NOT the healthy habit?
A. Cook meals at home and drink more water.
B. Go outside.
C. Less sitting and more standing.
D. Have meals whenever you want to.
商品是能够满足人们某种需要的产品，因此，人们生产的各种商品都是为了满足自己需要的。
A. 对
B. 错
Which is NOT the advantage of drinking more water?
A. Nourish skin.
B. Prevent kidney stones.
C. Keep poops regularly.
D. Refresh yourself.
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