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     1     extremely serious problem. By the middle of the 21st century, we will have used up all the oil that     2     (drive)our cars if at the rate we’re going. Even if scientists develop some new     3     (way)of feeding the human race, the crowded conditions on the earth will make     4     necessary for us to look for open space somewhere else. But none of the planets in our solar system are able     5     (support)life at present. One possible solution     6     the problem, however, has recently been raised by an American scientist, Professor Carl Sagan. His idea is     7     before the earth’s resource are almost exhausted, it will be     8     (total)possible to change the atmosphere of Venus(金星) and so create a new world almost as large as earth itself.

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

Have you ever imagined     1    (live) in 2200, about 200 years from now? A recent study describes robots, underwater cities and holidays in space. City planners, experts on space and architects    2     (ask) to give their ideas of life in 2200. According to them, the way people live, work and play will be totally different     3     how we do these things today. They also said that over twenty years ago, people couldn't imagine how the Internet     4     the smartphones would change our lives. But today, both have changed the way we communicate, learn and do daily things, and the changes in the next century will probably be even     5    (great).

Those     6    (question) in the research said that people might not go to the office in the future but would work at home instead. People will have advanced 3-D printers that will enable    7     to download a design for furniture or a food picture and then to "print" the sofa, table or pizza at home.    8     will also be less need for visits to the doctor. People will have a home health capsule that will "diagnose"    9    the problem is and provide various treatment.     10    (hopeful), they will also be going into space for holidays to get resources that have been used up on earth.

The 2020 Nobel Prize in Chemistry     1    (award)to Emmanuelle Charpentier and Jennifer A. Doudna recently. The two female scientists won the prize     2     the development of a method of genome (基因组) editing.

Gene editing has a wide     3    (apply) across the world. It can     4     (direct) change the DNA of a lifeform and has the potential of leading to     5    (benefit) results.

One of the most convenient methods of gene editing is called CRISPR/Cas9,     6     was discovered by the two Nobel winners. The method enables scientists to cut a sequence of DNA into two pieces,     7    (allow) nature to “repair” it. During the repair process, errors will be introduced to create a different sequence of DNA, thus resulting in an     8    (edit) gene.

In simple words, CRISPR/Cas9 is the “scissors” of genes. The greatness of CRISPR/Cas9 lies in extreme accuracy. It also enables humans to breed (孕有) more plant varieties and develop better treatment of cancer.

In the future, the discovery     9    (expect) to have a revolutionary impact on the life science and make the dream of curing some diseases come true.

There will be no traditional Nobel Awarding Ceremony in Stockholm this year due to the COVID-19,     10     an online version will be held instead.

5G is developing, but most of us aren't really sure what it is or the reason     1     we need it. A big part of the reason is that 5G means more than one thing. If you ask different people, you     2    (provide) with different answers.

Experts believe that 4G is on     3     way out. In 2020, the U.K. is expected to use 5G. At present, it is unknown exactly what influence 5G will have on people's life but it is widely thought that 5G will     4     (definite) be faster than any generation of networks we have used previously.

Work will likely become much easier as 5G will allow quicker downloads and a better ability to work online even if there is no wi-fi connection. With the     5     (develop) of 5G, driverless cars will be able to communicate     6     other vehicles, which can reduce road accidents by about 10%, One of the most     7     (impress) things will be that people can see which seats on a train are accessible to     8     (they) when it arrives at the station.     9     (get) around the world will also be more convenient.

A number of     10     (company) are now working on bringing 5G to the market. It remains to be seen how much of the country 5G will cover and whether everyone will be able to benefit from it.

Life on Mars

Some people believe humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population.     1    (hopeful), people could start all over again and build     2     better world on Mars. Here is what life there could be like. At present, our spacecraft are very slow—it would take     3    (month). With the development of technology, the journey might only take about 20 minutes by 2100 in spacecraft     4     travel at the speed of light!     5    , the spacecraft would travel so fast that the journey might be quite     6     (comfort). Many people would feel ill. Humans cannot survive     7     water, oxygen or food. Nobody knows     8     there would be enough water or oxygen on Mars for people there. Gravity could be another problem. The gravity on Mars     9    (be) only about three-eighths of that on the Earth. People would have to wear boots that are specially designed to prevent     10     from floating off into space. Life on Mars would be interesting as well as challenging.