[题目] people are talking about the movie star.A. Lot of B. A lot C. A lot of D. Much 题目和参考答案——青夏教育精英家教网—

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【题目】_______ people are talking about the movie star.

A. Lot of B. A lot C. A lot of D. Much

【答案】C

【解析】句意：很多人正在谈论这个电影明星。lots of很多，同义短语是a lot of，可以修饰可数名词，也可以修饰不可数名词，A和C 两个选项的构成都不对。much很多，修饰不可数名词，这句话中的主语people是集合名词，是复数的意思，故用much修饰不对。选C。

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You're not the same person you were as a child. You're not even the same personyou were five years ago. We don't just mean your personality. While we'd love tostart a never-ending discussion over the “true self”，we're here to talk about thecells（细胞）in your body.

Do you know how your fingernails and hair are constantly growing and replacingthemselves? The same thing happens almost everywhere in your body. Your outerlayer of skin makes way for fresher skin, and inside your veins（血管），blood cells turn over to make wayfor fresh blood. It's probably no surprise that these types of cells are short-lived, even some of the mostseemingly permanent（永久的）parts of your body replace themselves over time-including your bones.

Strong as your bones might seem, the cells they're made of won't last a lifetime. Bones are masters at rebuilding themselves, which is why most broken bones can heal on their own into the right shape.

Bones have special cells called osteoclasts（破骨细胞）whose job is to break down bone, even if itisn't broken, and send the minerals into the blood stream. This may sound frighteningly like your bonesare wearing away, but your body knows what it's doing. As osteoclasts break down bone, osteoblasts（成骨细胞）build up new bone to replace the old. By the end of each year, about 10 percent of yourentire adult skeleton will have been rebuilt through this process.

If 10 percent of your bone breaks down every year, it must take about ten years to renew 100percent of your skeleton. That would be a great guess, and it lines up nicely with the medical myth thatthe human body's cells are fully replaced every seven years, but the body is a bit more complex. That10 percent is just an average-some bone grows faster than that, and some grows slower. While someparts of your bone will turn over quickly, other parts will stick around for decades. In fact, most bonecells could live as long as 50 years.

So before you get wrapped up in an identity crisis（危机）about the cells in your body disappearingon you, know that you can lose some hair and you can cut your nails, but the bones of you aren't goinganywhere-at least not very soon and not all at once.

【1】Which of the following is TRUE according to the passage?

A. All the cells in our body are the same ones that we were born with.

B. Our blood cells are constantly growing and replacing themselves.

C. It must take about 10 years to rebuild 100 percent of our skeleton.

D. Osteoblasts can break down skin and also rebuild it over time.

【2】The underlined words "wearing away" probably mean“＿＿”．

A. building upB. taking offC. dying outD. turning on

【3】What does the passage mainly talk about?

A. Our skeleton seems permanent but renews itself over time.

B. It is not surprising that some cells in our body are short-lived.

C. There are two types of cells in our bones: osteoclasts and osteoblasts.

D. We are not the same person we were five years ago because of personality.

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Choose a good pair of running shoes. They don't need to be expensive; they just need to give your feet good support.

Find a running________. On days that you don't feel like exercising, he or she can help encourage you. If you can't find anyone who enjoys running, take your dog along. It is always ready to go outside, and the exercise makes it healthier too.

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【1】A. improvesB. increasesC. delaysD. changes

【2】A. enjoymentB. healthC. energyD. wealth

【3】A. specialB. fairC. dangerousD. wise

【4】A. neighbourB. assistantC. passengerD. partner

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【6】A. forB. whileC. ifD. though

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