In China, many people     1     read self-help books, such as how to make money quickly. But we also need to live a happy life. History of China is such a book. There are many interesting stories. They make history     2     to understand.

In the US, teachers give students a reading list every     3     weeks. Who Moved My Cheese is one of the most     4     US school reading books. It shows you     5     to deal with changes in your life.

    6     knowing what to read, next is to develop your own good reading habits. If you can’t concentrate (集中) for a long time, read in short periods of     7    . Ten minutes in the morning, 10 in the afternoon and 10 in the evening make half an hour a day, about four     8     a week.

Make your own reading     9     . It can be the best selling books on famous websites or some books your teacher tells you to read. Talk about the books you are reading with your family or     10    . It doubles (加倍) the fun to read. The more fun you get from books, the more books you will read.

Grey Heffley is a middle school student. He     1     to be a “problem child”. He has trouble with family and friends. He plays video games too much. He daydreams a lot. But he is     2     around the world.

In fact, Greg is the main character in Diary of a Wimpy Kid(小屁孩日记). It is an illustrated(有插图的) book series by US writer Jeff Kinney. The first book in the series(系列) was     3     in 2007. Over the years, his books have been translated into 40     4     and sold more than 150 million copies.

In one of the books, Greg continues his adventures. His dad buys him a French horn(圆号).     5    , he finds that he has no     6     in learning it. His visit with a new friend goes wrong. Greg’s mother gets     7     with him because he plays too many video games. So he decides to try something new. He tried to make a movie. But he still fails.

The 11th book is a Halloween-themed book. “There is a series of     8     books that Greg’s classmates love, and he is     9     to a scary Halloween party,” Jeff told Time for Kids.

It always focuses(以……为焦点) on childhood. That’s why the books are so popular. “I am     10     to look at children from a different angle(角度) each time and cover the whole experience of being a kid.” Jeff told Time for Kids..

If you want to know     11     it means to be a kid, just read Greg’s story.

Everyone of us may have a headache. But do you know about headaches? What may cause them? And what should we do     1     we have a headache? When should we go to see a doctor?

A headache is not a disease（疾病）, but it may show that     2     in your body is wrong. We may have more than one headache each month.

Usually a fever or some other     3     may cause headaches. You may get a headache when you work too hard. You may get a headache when you can't get enough     4    . You may get a headache when you exercise on an empty     5    .

What should you do if you have a headache?

You should lie down and have a good rest. You should get enough sleep.

If you have headaches often, you need to see a doctor.

Lighthouses are structures along the shorelines of large bodies of water. For tourists, lighthouses can be an interesting place to visit.     1     , and photograph. For historians, they are a window to the past and reminder of a different way of life. For sailors and ship captains, they are a sign of safety. They can protect a boat from running aground（搁浅）at night or other times when there is a fog or a storm.

Originally, lighthouses were built with rooms for the lighthouse keeper. It was the job of the keeper to make   sure that it was always working     2     . Although it could be lonely at times, it was an important job. Today, almost all lighthouses are automated, which means that there is no need for lighthouse keepers.

No one is certain when lighthouses first     3     . We do know that lighthouses is probably more than 3,000 years old. An epic Greek poem titled The Iliad was written by a man named Homer around 1200 B.C. In the poem, Homer refers to a lighthouse, giving modern scholars an idea of how long lighthouses have been a part of human life.

Early lighthouses were quite different from today’s lighthouses. They were usually made of iron baskets that were Suspended from long poles. The baskets     4     burning coal or wood. In the 1700s, these baskets were taken the place of by oil or gas lanterns. When electricity was invented, the lanterns were changed into electric beacons（灯标）.

In 1822, a French physicist named Augustin Fresnel invented a lens （透镜） that would prove to be very important in lighthouse technology. With the invention of the Fresnel lens, it became possible to make a beam of light reach as far as 28 miles from shore!

Lighthouse beam can be used to help sailors identify the lighthouse and their own location.   Sailors can     5     the patterns and lengths of lights from the lighthouse. Then they look it up in a     6     book that will tell them which lighthouse they have seen. During the day, sailors can identify lighthouses simply by their     7     . Some are short and fat, while others are tall and thin. They can be made of many different materials, such as wood, stone, brick and steel. The patterns also differ greatly. Some lighthouses are painted with stripes or a series of diamond shapes that make them look different. Others can be recognized by their shape—round, square or rectangular.

Many lighthouses are not in use. They are sometimes changed into museums, inns,     8     centers, or even private homes. If you ever have a chance to visit one, getting glimpse of history is worth the trip.