How will our continuously growing population affect our way of life, our environment, even our planet? No matter how you look at it, we will face {#blank#}1{#/blank#}extremely serious problem. By the middle of the 21^st century, we {#blank#}2{#/blank#}(use) up all the oil that drives our cars if at the rate we're going. Even if scientists develop some new {#blank#}3{#/blank#}(way)of feeding the human race, the crowded conditions on the earth will make {#blank#}4{#/blank#}necessary for us to look for open space somewhere else. But none of the planets in our solar system are able  {#blank#}5{#/blank#}(support) life at present. One possible solution {#blank#}6{#/blank#}the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan. His idea is {#blank#}7{#/blank#}before the earth's resources are almost exhausted, it will be  {#blank#}8{#/blank#}(total)possible to change the atmosphere of Venus（金星）and so create a new world almost as large as earth itself.

    However, {#blank#}9{#/blank#} his idea is turned into reality, humans have a long way to go. On the one hand, Venus is much {#blank#}10{#/blank#}(hot)than the earth; on the other hand, there is only a tiny amount of water there.

    Many people may think the Forbidden City, or the Palace Museum as it's also called, is{#blank#}1{#/blank#} old-fashioned museum{#blank#}2{#/blank#} in recent years, the museum has been working hard {#blank#}3{#/blank#}（promote） Chinese cultural heritage among young people.

    The museum's online store now offers special cultural and creative {#blank#}4{#/blank#}（product）. For example, in 2014, it started to make T-shirts that look like an emperor's coat. It also sold earphones that look like the necklaces {#blank#}5{#/blank#}（wear） by ancient officials.

    The museum has also launched an app called A Day of an Emperor. When using{#blank#}6{#/blank#}people are taught about a regular day in the life of an emperor of the Qing Dynasty. Last year, a documentary titled Masters in the Forbidden City {#blank#}7{#/blank#}（become） popular online. The documentary is about the people {#blank#}8{#/blank#} job is to repair the relics in the museum. Many of these workers are young, and some are even {#blank#}9{#/blank#} their 20s.

    Some other museums across the country, such as the National Museum of China{#blank#}10{#/blank#}（inspire） by the Palace Museum's efforts in the past five years and are working on similar projects of their own.

    First, reading books {#blank#}1{#/blank#}(be) fun. You can always keep yourself {#blank#}2{#/blank#}(interest) and it can help you have an enjoyable time if you like reading. This is especially useful when the weather is bad. It is a {#blank#}3{#/blank#}(relax) hobby too.

    Next，you can read a book anywhere：in a car，in a waiting room, on a plane, in bed—even in the bath.{#blank#}4{#/blank#} you need is a book! Reading is a convenient hobby as it is easy to stop and then start again.

    Another good reason for reading books is {#blank#}5{#/blank#} it is useful. If you read as a hobby，you {#blank#}6{#/blank#}(get) better and better at it. This means that you will read faster and will become {#blank#}7{#/blank#}(good) at understanding what you read. As your reading improves, you will probably find your school work becomes much easier. Many school subjects depend {#blank#}8{#/blank#} good reading and, as you read you learn more and more.

    Good readers are most likely to be good {#blank#}9{#/blank#}(write), too. They are usually good at{#blank#}10{#/blank#}(spell) as well, and have more things to write about. Reading books is really a wonderful hobby.

    Two new satellites of the BeiDou Navigation (导航) Satellite System (BDS){#blank#}1{#/blank#}(send) into space from the Xichang Satellite Launch Center in Sichuan Province on November 19, 2018.

    The satellites entered the orbit{#blank#}2{#/blank#}(safe) more than three hours later and will work with 17 other BDS-3 satellites already in space. They are also the 42^nd and 43^rd{#blank#}3{#/blank#}(member) of the BDS satellite family. China launched these satellites with{#blank#}4{#/blank#}aim of providing navigation services for countries and regions{#blank#}5{#/blank#}participate in the Belt and Road Initiative(倡议) by the end of 2018. This is a key step for BDS developing{#blank#}6{#/blank#}a Chinese experimental system to a regional and then a{#blank#}7{#/blank#}(globe) navigation system. The positioning{#blank#}8{#/blank#}(accurate) of the BDS-3 system has been improved to 5 meters.{#blank#}9{#/blank#}(name) after the Chinese term for the Plough(北斗七星), the BeiDou system has been serving China for 18 years. The system is expected {#blank#}10{#/blank#}(provide) first-class services around the globe by the end of 2020.

    No one knows exactly {#blank#}1{#/blank#} the earth began. However, according to a widely accepted theory, the universe began {#blank#}2{#/blank#} a "Big Bang". Then the dust {#blank#}3{#/blank#}(settle) into a solid globe. As the earth cooled down, water began to appear on its surface. Many {#blank#}4{#/blank#}(science) believe that it was the presence of water that allowed the earth to dissolve {#blank#}5{#/blank#}(harm) gases and acids into oceans and seas, which made it possible for life to develop.

    Millions of years later, the first small plants appeared on the surface of the water. Their development {#blank#}6{#/blank#}(follow) by early shellfish, all sorts of fish, green plants and land animals. Reptiles {#blank#}7{#/blank#}(produce) young generally by laying eggs while mammals gave birth to young baby animals. Dinosaurs existed on the earth for over 140 million years before they suddenly disappeared. The reason {#blank#}8{#/blank#} they disappeared still remains a mystery.

    Finally, humans appeared and spread all over the earth. But they are putting too much carbon dioxide into the atmosphere, which prevents heat from {#blank#}9{#/blank#}(escape) from the earth into space. As a result of this, people believe the earth may become too hot to live on. So {#blank#}10{#/blank#} life will continue on the earth will depend on how this problem can be solved.

    I like reading. {#blank#}1{#/blank#} I was 9 years old, I caught a bad cold. I had to stay at home for several weeks. My mother bought me some novels. Soon I {#blank#}2{#/blank#} (attract) by the stories. Since then I have made use of any time to read. Now, I often surf the Internet at home, where I've found many students like reading as I do. We exchange our reading experience and become online friends. {#blank#}3{#/blank#} (read) brings me both happiness and friendship.