New technology rules the whole world now. But I still remember when I was a child, I did not have a cell phone or a computer because it was not necessary at all in those days. The Internet was not popular and the touch screen technology was unknown.

At this time here in the US smartphones are really a need, especially for young and business people. There are many applications (应用软件) really useful like maps, dictionaries, e-mails and games.

For me, I use my smartphone to check the weather and to look for something on the Internet and of course to keep communicating through calls and texts. Besides, I like music applications, GPS and Facebook.

Many tests have discovered that cell phones cause damage to us because they send out radioactive (具有放射性的) waves to our bodies and this could cause cancer.

Psychologists say that these devices can affect behavior and I believe everyone knows it is harmful to the eyes if we are sitting for a long time in front of the computer. However, it seems to be difficult for us to give up, even if we know how bad it is for our health. The use of technology becomes more and more important in our lives.

I think the use of technology has brought us unimaginable things. If we use technology correctly, I am sure it would be possible to decrease the damage to our bodies.

Keep in mind that it is important not to focus only on technology, but to spend time with our families and people close to us.

   A primary school in Jinhua, Zhejiang Province, has announced (宣布) it no longer requires parents to sign their children’s homework. China Youth Daily _____:

Putting an end to the _____ that parents sign off the homework of their children _____ the burden on many parents, as otherwise they would have to look through primary school homework after a hard day’s work. But there are _____ that if parents stop having to sign off their children’s homework, the children will not get _____ grades.

_____, the most efficient way for children to study is to develop their _____ to learn and do their own homework.

When doing homework, students practice and _____ apply what they have learned. Truly, teachers are _____ to check students’ homework and ______ their mistakes. But some parents correct their children’s mistakes by themselves when signing off it.

It is the ______ of students to do their homework, be responsible ______ their studies and correct their mistakes. Parents’ supervising (监督) their homework, checking their answers and ______ the harder problems will only make children ______ aware of their mistakes and encourage them to ______ their parents’ help when they face any problems.

Children have to manage their own learning and ______ the ability to study by themselves, as competency (能力) will not be achieved ______ a student simply repeats fixed ______ in which he is helped in school by teachers and at home by parents.

An experiment ______ by Walter Mischel in the 1960s proved that children with better self-discipline performed better in their studies and interpersonal relationships.

There is little doubt that parents’ supervision can make children’s homework better. But it does not give children the ______ to practice their ability to solve problems independently.

Beijing was once a city of bikes，known as the Bicycle Kingdom，【小题1】cars were reserved for official business and the politically powerful. However，decades of economic 【小题2】（grow）led to a huge flowing of cars in the city. Owning one became not just a marker of reaching the middle class but also a requirement for marriage. As the economy developed，autos pushed bikes off the roads，【小题3】（create）heavy pollution and miserable traffic.

【小题4】（fortunate），now Beijing may be returning to its roots. Thanks to about 20 technology companies，brightly colored shared bikes 【小题5】（flood）into Beijing in the last two years. Many local residents welcome the shared bikes 【小题6】the flexibility and freedom they offer. They pick up the bikes and then ride and drop 【小题7】off anywhere they like，locking the back wheel，with no need 【小题8】（find）a fixed place.

Analyses in China say it is three factors that contribute to bikes' increasing rapidly: a lot of cash looking for a home, a good idea and government support. "As the city's population grew, traffic jams got 【小题9】 (bad). "Cai, the ofo spokeswoman, said, "Shared bikes could solve the' last mile' problem in 【小题10】environmentally friendly way."

   Common Sense Media，a group that helps children，parents and teachers better understand media and technology，did a study. It paid attention to all kinds of media-related activities，from old methods like reading and listening to the radio，to new favorites like using social media and video chatting. More than 2，600 kids were surveyed. Here are some truths and myths（错误观念）the study found：

Truth 1：Some teens spend too much time looking at screens.

One in five teens spends more than six hours on screens each day，and 18%of teens are looking at their screens for more than 10 hours a day. Often they watch television on one while chatting with friends on another.

Myth 1：This is the end of reading.

The average（平均的）time young people spend reading，either in print or on a screen，is only 30 minutes a day. However，kids who received the survey say reading is one of their favorite activities.

Truth 2：Boys prefer video games while girls prefer social media.

Among teen boys，71% enjoy playing video games，twice as many as teen girls. And while more than 25%of teen boys list playing video games as their favorite media activity，only 2%of teen girls do.

What's more，teen girls spend about 40 minutes more each day on social media than boys do.

Myth 2：TV and music have been muscled out（强行逐出）.

For teens，TV is still the top media activity. They enjoy it most and watch it every day. In fact，47%of teens have TV sets in their bedrooms. For teens，while 57%have TV sets in their rooms，music is the main form of amusement. However，only about a third listen to music on the radio. Most teens listen to it on their smartphones.

Note: You are a teen if you are between 13 and 19 years old，while a tween is a child between the ages of 10 and 12.