题目内容

阅读理解。
读短文,判断正(T)误(F)。
    One day, Tom and his father go out for a walk. Suddenly they see a big brown dog. The dog begins
to bark(汪汪叫). Tom is afraid. He wants to run home. His father says: “Don’t be afraid, Tom. Don’t you know the saying(谚语), a barking dog does not bite(咬人)?
    "Oh, yes," said Tom, "I know the saying, you know the saying, but does the dog know the saying?"
(     )1. Tom and his father go home one day.
(     )2. They see a big dog barking.
(     )3. Tom isn’t afraid of the dog.
(     )4. tom wants to run home.
(     )5. The dog knows the saying, too.
1. F 2. T 3. F 4. T 5. F
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阅读理解:读A、B两篇短文,根据短文内容选择最佳答案。

     Height is just one of the thousands of features 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 most probably 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 plenty of sleep and enough exercise will help you grow to the expected height. 
     No doubt (怀疑) you're wondering how fast you should grow. It depends. There's no perfect or right
answer. Generally speaking, kids grow about 2 inches (6 centimeters) 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 centimeters 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 growth spurt (高峰)
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 and 9 and 15 for boys. 
    You'll usually begin to notice that you're growing faster about a year or so after your body starts to show the
first changes of puberty.