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题型:阅读选择 题类:常考题 难易度:普通

Height is just one of the thousands of features (特征) that your genes (基因) decide. In fact, because you have two parents, your genes provide you a height that usually lands somewhere between the height of each parent. If both your parents are tall, then maybe you will be tall, too, but if you have questions about how tall you're going to be, ask your doctor if he or she can help you find it out.
But genes don't decide everything. For example, eating an unhealthy diet can keep you from growing to your full potential (潜力). Getting enough sleep and enough exercise will help you grow to the right height.
No doubt you're wondering how fast you should grow. There's no perfect or right answer. Kids grow about 2 inches (5 centimetres) a year between age 3 and the time when they start puberty (when your body starts changing and becoming more grown up).
Your doctor will know how your growth has been going over the years. Two centimetres here and 2 inches there are not nearly as important as the height you're at now, how you've been growing up to this point, and what other changes your body may be going through.
Don't be scared if you seem to have grown a lot in a very short time. Everyone has a very quick growth during puberty. The age for starting puberty is about 10 for girls and about 11 for boys. But it can be earlier or later – between 7 and 13 for girls, 9 and 15 for boys.
You'll usually begin to notice that you're growing faster about a year after your body starts to show the first changes of puberty.

(1)、 The Chinese for the underlined word in the third paragraph “puberty” is           

A、童年时期 B、婴幼儿时期 C、习惯养成期 D、青春期
(2)、If you want to know how fast and how tall you should grow,          

A、you should have enough exercise B、you can ask doctors for help C、you should protect the environment D、you can record your growth during puberty
(3)、This passage is mainly about            .  

A、how the genes work in your body B、when is the time you grow fast C、why you look like your parents D、how you grow to a certain height
(4)、 After reading this passage, we can explain ___________.    

A、how good it is to be a doctor B、how much sleep we need C、why genes can't decide everything D、what an unhealthy diet is
(5)、Which is NOT mentioned (提及) in the passage? 

A、Your height most probably depends on (取决于) how tall your parents are. B、Girls' age for starting puberty is usually earlier than that for boys'. C、The time showing the first changes of puberty is never noticed. D、You may be scared sometimes when you grow too fast.
举一反三
 阅读下面的短文,然后根据首字母或括号内所给的中文意思写出单词的正确形式。每.空. 限.填.一.词.。

Many of us don't spend a lot of time improving our writing skills. The following suggestions can be h{#blank#}1{#/blank#}. 

Make good word choices. When we're not sure which word is the c{#blank#}2{#/blank#}one for a   sentence, look it up in a dictionary. In that way, we are more likely to express ourselves properly, especially for{#blank#}3{#/blank#} ( 演 讲 ). 

Check facts. If we want people to believe what we write, we must make sure our facts are true and vivid. The facts will impress the readers. 

Polish. It is rewriting. Try to{#blank#}4{#/blank#}( 避 免 ) some mistakes. Although it takes more time and more work, rewriting makes our writing better. 

Read a{#blank#}5{#/blank#}. Sometime it's easier to find problems with spelling, word usage, and g{#blank#}6{#/blank#}. It also helps us not only find out our problems but also{#blank#}7{#/blank#}(欣赏) our writing. Prepare a list. It includes: Is there a proper title? Is the beginning attractive enough? Have we explained every point? Is the ending brief? This can help us to make sure we have covered everything{#blank#}8{#/blank#}(精确). 

It is not easy to become a better writer. Be{#blank#}9{#/blank#}(耐心)! Follow the writing skills above. 

We can write better articles as long as learn w{#blank#}10{#/blank#}, widely and well. 

 阅读下面材料, 然后从每题所给的A、B、C、D四个选项中选出一个最佳选项。

 Have you ever experienced the feeling of falling as you start to fall asleep? Sometimes you may wake up to this feeling. If so, don't worry. Many people have felt the same thing.

 In fact, the muscle twitches(肌肉抽搐) in the arms, legs or other parts of the body are called hypnic jerk(入睡抽动) or sleep starts. And they are very common. Up to 70 percent of people experience them sometimes, Huffing to Post reported. But what causes it?

 There are some theories(理论). Some scientists believe that the feeling of falling comes from the body relaxing itself, especially if the person is anxious or unable to get comfortable. As you' re going to sleep, your muscles become relaxed. But your brain stays awake. It misunderstands the relaxing of your muscles as a sign that you' re falling. The brain then jerks the body awake as if it's trying to protect you.

 Other scientists believe that different phase(时期) of sleep might cause hypnic jerks. When we sleep, we experience two phases: non-rapid eye movement(NREM,非快速眼动睡眠期) and rapid eye, movement(REM,快速眼动睡眠期). During REM, our heart rate can act irregularly. If the body experiences flashes(一瞬间) of REM while entering sleep, these irregularities could cause twitches.

 If you don't want to experience hypnic jerks, scientists have some suggestions. When you become deeply relaxed, you can learn how to reconnect your body with your brain slowly by moving your fingers and toes a little bit. Then start to move your head and open your eyes so that you can avoid the muscle twitches.

 But experts agree that hypnic jerks, though sometimes scary, are harmless. If it wakes you up, simply roll over and go back to sleep, But keep in mind: a caffeinated drink, exciting evening activities or stress may make hypnic jerks happen more often.

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