Unit 5 单元过关检测
满分：150分 时间：120分钟
听力（满分30分）略
第一部分 阅读理解（共两节，满分40分）
第一节 （共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A、B、C、和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
Is It Bad to Cross Your Legs When You Sit?
Crossing your legs is an extremely common habit; most people don’t even notice that they’re doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.
A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason this happens is because the blood in your legs has to work against gravity to be pumped back to your heart, crossing one leg over the other increases resistance, making it even harder for the blood to circulate.This causes your body to increase your blood pressure to push the blood back to the heart. You won't feel any immediate effects, but if you sit for long periods of time it's important that you take note of how long you have your legs crossed for. You shouldn't have your legs crossed for more than 15 minutes, and it's important that you get up and walk around at least once every hour.
Crossing your legs can also lead to neck and back pain. Ideally, it's best for our bodies to sit with our feet planted flat, hip width apart, on the floor, but it's not easy to maintain perfect posture all day at the office. When you sit with your legs crossed your hips are in a twisted position, which can cause one of your pelvic bones to rotate. Since your pelvic bone supports your neck and spine, this can cause pressure on your lower and middle back and neck.
You also might notice that when you sit with your legs crossed for long periods of time your feet and legs get tingly or have the feeling of being asleep. This is because when one leg sits on top of the other it causes pressure on the veins and nerves in your legs and feet. It can cause numbness and/or temporary paralysis in the legs, ankles, or feet. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.
So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.
21. According to para 2, we can infer that___________ A. it's no big deal to cross our legs for less than 15 minutes. B. we will feel uncomfortable at the moment we cross the legs. C. we should take a walk every hour after sitting still.
D. crossing legs while sitting makes it harder to circulate our blood.
22. How many health problems can be caused by crossing legs according to the text? A. 2 B. 3 C. 4 D. 5
23. Which of the following best shows the structure of the passage? A. ① B ① C. ① D. ①
② ③ ② ③ ② ③ ④ ② ③
④ ⑤ ④ ⑤ ⑤ ④ ⑤
B
Columbus Day has been on American calendars since 1937，when President Franklin D．Roosevelt declared October 12 a federal holiday to honor the Italian explorer who“discovered”the Americas in 1492．However，the holiday has always been controversial．Many people believe that Christopher Columbus should not be given credit for“discovering”the continent，since native Americans had already been living there for generations．
Besides，the explorer，s mission was not a scientific“voyage of discovery”，but one intended to conquer the new land．Critics maintain that the Spanish army Columbus brought on his second voyage，caused the deaths of hundreds of thousands of indigenous(土著的)people．Those that survived the massacre became slaves，working in mines．Many，therefore，believe that the explorer's arrival should not be celebrated． In 1977，a delegation of Native nations at the International Conference on Discrimination Against Indigenous Populations in the Americas，proposed renaming the holiday to“Indigenous People’s Day”．The proposal passed with a majority． However，convincing the rest of the country to do the same was not that easy．It
took 15 years before the city of Berkeley in California adopted the name in 1992 and then 22 more years before Minneapolis，MN and Seattle，WA did the same in 2014．The following year，eight more cities including Albuquerque，NM and Portland，OR，began celebrating the second Monday of October as“Indigenous People’s Day”. The movement really started to gain momentum in 2016 when 19 cities，including Boulder，CO and Phoenix，AZ，as well as the states of Minnesota and Vermont，a11 decided to rename the day to honor Native Americans．In 2017，21 more cities，including Austin，TX and Los Angeles，CA have made the shih．
With the increasingly larger number of cities moving away from Columbus Day each year，it will be interesting to see if“Indigenous People’s Day”gets federal recognition．Meanwhile，it will continue to be the focal point of debates throughout the Americas．
24．Which of the following is the best title of the passage?
A．Indigenous People’s Day Has Got Federal Recognition after Years’Work B．Columbus Day Honoring the Italian Explorer Has Always Been Controversial C．Christopher Columbus Should Not Be Given Credit for Discovering Americas D．More Cities Have Replaced Columbus Day with Indigenous People’s Day 25．Many people don’t agree that________． A．Indigenous discovered the continent B．Columbus was a remarkable explorer C．Native Americans were abused D．Columbus Day is a public holiday
相关推荐：
loading