For many parents, making sure that their children get the right amount of sleep can be 【小题1】 (stress). This is especially true during high-pressure times such as exams when students study all night for the next day. 【小题2】 (unfortunate), it is often counterproductive (适得其反的) because with fewer hours to sleep, the brain doesn’t get enough time to keep 【小题3】 they’ve studied the night before.

Poor sleep will have all sorts of negative effects on teenagers, 【小题4】 (include) the rise in blood pressure, and impatient behaviors. Without enough sleep, the brain can no longer work 【小题5】 (deal) with information properly and use information already 【小题6】 (learn).

So, how can parents help? If you think your child needs more sleep, try making gradual adjustments to their sleeping habits. So far, studies 【小题7】 (show) improvements in changing sleep patterns. And remember your children are going through 【小题8】 period of time in their lives when their brains and bodies are going through a lot of 【小题9】 (change). Not only is your job to help make a difference, but it’s also to ride the wave with them. It may not be easy, 【小题10】 they will thank you for your help eventually.

Some misunderstanding is putting shark populations at risk now. Thousands of sharks are dying as【小题1】 result of people’s false beliefs.

Female sharks need males to make babies. Some female sharks have the ability 【小题2】(produce) a baby by themselves and have young sharks without a male shark. That’s something commonly 【小题3】(see) in plants and insects like ants and bees.

Shark fins have medical function. 【小题4】(tradition), it 【小题5】 ( believe) that shark fin soup has health benefits and is quite special in China. 【小题6】 modern scientists point out that shark tissue(组织) can be extremely high in poison. What’s more, shark fishing kills up to 100 million animals each year, endangering several different species.

If you’re bitten by a shark, you will be a goner. You are more than twice as likely to die from a lightning strike as from a shark bite, according 【小题7】 the Florida Museum’s International Shark Attack File (ISAF). “Even if you are bitten, the large 【小题8】(major) of people survive”, says Dr. Chapman. In fact, there were sixty-six unprovoked(无端的) shark bite【小题9】( incident) around the world in 2018, only six of【小题10】 were dangerous.

Many people are wondering if it is safe to talk on the cell phones while driving. Most of people think that the use of cell phones should 【小题1】 (ban) while they are driving 【小题2】in that case accidents can easily happen.

A growing number of states are making rules to keep young drivers 【小题3】 using cell phones while they are driving. When there is 【小题4】 car accident, police officers will find out 【小题5】 any of the drivers is using a cell phone. There have been some very bad car accidents 【小题6】(cause) by drivers being distracted by cell phones.

Drivers sometimes forget to watch the road 【小题7】(careful) when they are using their phones. Not 【小题8】 (pay) attention to the road can be dangerous, even deadly.

【小题9】 is important for drivers to focus on the road. They need to pay attention to 【小题10】 is going on around them. So, stop using your cell phones while driving.