《2025年基础知识同步训练10分钟八年级英语上册沪教版深圳专版》

B
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 with a height that usually lands somewhere between the heights of your parents. If both your parents are tall, then most probably you will be tall, too. 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. Getting plenty of sleep and enough exercise will help you grow to the expected height.
Maybe you're wondering how fast you should grow. There's no right answer. Generally speaking, kids grow about two inches a year between the age of three and the time when they start puberty(青春期).
Your doctor will know how your growth has been going over the years. Two centimeters here and two inches there are not as important as the height you're now. How you've been growing up to this height, or what other changes your body may be going through.
Don't be nervous 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 between 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.
(B) 16. How can we know how tall we will be?
A. We should have a healthy diet.
B. We can ask our doctor for help.
C. We should have enough exercise.
D. We can record our growth during puberty.
(D) 17. The underlined word “potential” means______.
A. contribution B. distance C. discovery D. possibility
(A) 18. Which of the following may the writer agree with?
A. Your body may be going through other changes when you are growing taller.
B. You should see a doctor when you have grown a lot in a short time.
C. Boys are always taller than their parents when they grow up.
D. Girls start their puberty much earlier than boys do.
(C) 19. If James hopes to grow fast, what should he avoid doing?
A. Getting plenty of sleep. B. Never staying up late.
C. Eating an unhealthy diet. D. Doing enough exercise.
(D) 20. This passage is mainly about______.
A. why the genes are important B. how fast your growth can be
C. why you look like your parents D. how tall you are going to be

答案： 16. B
17. D
18. A
19. C
20. D