More than 1billion people aged from 12to 35are at the risk of losing their hearing from     1     (listen) to loud music on their audio devices. According to WHO,     2     is considered unsafe that you hear a sound that is above 85decibels for eight hours or 100decibels for 15minutes.     3     (normal), users of personal audio devices choose to set the volume between 75-105. Shelly Chadha of the WHO suggested that all smartphones should be fitted with a measurement system,     4     would tell you how much sound you’re listening to, and when you go over the limit.

【推荐2】Reading a paper book may be a forgotten luxury for many people thanks to today's busy lifestyles     1     listening to a book while shopping or jogging is a growing trend. Now, audio books can be easily downloaded from the Internet at the same, if not     2    (low), prices as the print     3    (edit).

Mary Beth Roche, publisher of Macmillan Audio, says many of their readers use audio books as a ''multitasking tool'', a way to consume books when their eyes are busy. For others, whose work may involve spending lots of time     4    (look) at the screen, audio books are a way to relax. ''It's sort of nice to sit back and have a story     5    (tell) to you,'' said Roche.

In the United States, audio books     6    (become) a serious business for a long time       7    (simple) because Americans on average spend so much time in their cars. ''It is a good way for consumers to make the time in traffic quality time, '' said Roche. 'Even way back when it was the cassette and then the CD, the number one place     8     people listened was in car. When audio books became available     9     the digital form, people started using     10     during other activities—when they are shopping, jogging, performing household tasks and so on.

The study found that between 1985 and 2017, average rural BMI increased     1     2. 1 in women and men. In cities, however, the gain     2     (be) 1. 3 in women and 1. 6 in men. The researchers described “striking changes” in the geography of BMI. In 1985，urban men and women in more than three quarters of the countries     3     (study) had higher BMIs than men and women in rural areas. But 30 years later, the BMI difference between urban and rural people in many countries had narrowed     4     (sharp).

This may be due to some disadvantages for people     5     (live) in the countryside, including   lower levels of income and education, higher costs of healthy foods, and fewer sports facilities.