1 . Coloring books are no longer just for children! In fact adult coloring books are topping bestseller lists. Why have adults decided to start coloring again?     1    

It is to relieve stress and anxiety.

    2     They take on full-time jobs that often demand more than 40 hours a week, equally as part-time jobs, family responsibilities, and trying some "fun" when they can. For many, there just aren't enough hours in the day, which explains why practising mindfulness becomes so popular. It's important to set aside some time to calm the thoughts. Coloring can be an escape from everyday stress.

    3    

A trend among adults is to seek out childhood experiences. That's why summer camps adults are cropping up across the country. Perhaps nothing is more equal to childhood than a coloring book. A brand-new coloring book with bright markers, crayons, and colored pencils provide endless possibilities. Adult coloring books are much more detailed than coloring books for children, but the emotions are similar and allow adults to feel as if they are "a kid again".

It is to put down the technology.

Adults are constantly staring at screens: Desktops, laptops, tablets, phones, TVS. etc.    4     Even some readers have e-readers and tablets to consume books, magazines, and newspapers. An adult coloring book provides a great outlet to escape from all of the screens. Of course, to truly realize the benefit of stepping away from the devices for a period of time, you can't constantly be checking them while you color! Turn them off and leave them in another room.

    5    

The amount and brightness of light from towns and cities around the world is at such a high level that it is reducing the darkness of night. Once upon a time, when night fell, we    1    (leave) in darkness. Things are different today. A study    2    (publish) in the journal Science Advances reports that artificial light at night is increasing    3    (rapid) in most countries worldwide. Scientists say it grew by 2.2 percent a year    4    2012 and 2016. The overuse of artificial light at nighttime is causing us many    5    （problem）. According to the International Dark-Sky Association, it is affecting not only our view of the universe, but also our environment, our     6    (safe), and our health. Artificial light is a threat to our     7     (nature) environment. It threatens animals that are active at night. It has ecological effects     8    many creatures, including humans, and may reshape the entire social ecological system. Many environmentalists thought the    9    (introduce) of LED lights would help the planet. However, cities are using more LED lights because they are cheaper,    10    is adding to the light pollution.

3 . There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the ______ home from work in the evenings. A man will be _______ the newspaper, and seconds later it     _____as if he is trying to ______ it.Or he will fall asleep on the shoulder of the stranger ______ next to   him. ______ place where unplanned short sleep ______ is in the lecture hall where a student will start snoring(打鼾)so ______ that the professor has to ask another student to ______ the sleeper awake. A more embarrassing(尴尬)situation occurs when a student starts falling into sleep and the ______ of the head pushes the arm off the ______ ,and the movement carries the ______ of the body along. The student wakes up on the floor with no ______ of getting there. The worst time to fall asleep is when ______ . Police reports are full of ______ that occur when people fall into sleep and go ______ the road. If the drivers are ______ , they are not seriously hurt. One woman's car, _______ , went into the river. She woke up in four feet of ______ and thought it was raining. When people are really ______ , nothing will stop them from falling asleep-no matter where they are.