C. first thought about sailing when he was five years old.
D. traveled around the world faster than Brian “BJ” Caldwell Jr.
55. We may infer from the text that __________.
A. David took the place of Robert in the Guinness Book of Records
B. David had never left his hometown before the trip
C. David is a determined person
D. His mother herself took three sailing trips.
D
Height is just one of the thousands of features your genes 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 goi ng to be, ask your doctor if he or she can help you find it out.
But genes don’t decided 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.
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 p oint, 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 f or 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.
56. The underlined word “puberty” means________.
A. when your body starts changing and becoming more grown up
B. when your body starts growing
C. when your body grows slowly
D. when your body stops growing
57. Which is NOT mentioned in the passage?
A. Your height most probably depends on how high your parents are.
B You may be scared sometimes when you grow too fast.
C. Girls’ age for starting puberty is usually earlier than that for boys’.
D. The time showing the first changes of puberty is never noticed.
58. After reading this passage, we can explain _____________.
A. how good it is to be a doctor
B. how much sleep time we need
C. why genes can’t decide everything
D. what healthy diet is
59. This passage is mainly about ________________.
A. how the genes work in your body.
百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库2019-2020年中考一模英语试题及答案(Word版)(7)在线全文阅读。
相关推荐：