How long will it take for a message to come back from Mars?
Giải bởi Vietjack
Thông tin: ...there won’t be any real-time communication. Even at the speed of light, communication between the earth and Mars takes about 20 minutes.
Chọn A
Dịch:
Sứ mệnh đi lên sao Hỏa
Bạn đã bao giờ có một giấc mơ về việc du hành đến một hành tinh khác trong hệ mặt trời của chúng ta chưa? Nếu bạn có, thì có một chương trình thực tế đang diễn ra ngay bây giờ và nó hy vọng sẽ đưa con người lên sao Hỏa vào năm 2023. Được gọi là Sứ mệnh Sao Hỏa Một, nó sẽ cử một phi hành đoàn gồm bốn người thực hiện sứ mệnh một chiều để chiếm đóng sao Hỏa . Những người được chọn sẽ phải sẵn sàng nói lời tạm biệt với trái đất mãi mãi, vì sẽ không có một chuyến trở lại.
Đối với những người được chọn, họ sẽ phải học làm nhiều việc khác nhau. Trước hết, họ sẽ sống phần đời còn lại của mình chỉ với một số ít người khác, vì vậy tất cả họ phải có những tính cách cho phép họ hòa hợp. Thứ hai, nơi sinh sống của họ sẽ không được rộng rãi lắm, vì vậy họ cũng sẽ phải đối phó với điều kiện đó. Nếu họ cảm thấy nhớ nhà, họ sẽ chỉ có thể liên lạc với mọi người trên trái đất thông qua e-mail và video và âm thanh được gửi qua lại. Tuy nhiên, sẽ không có bất kỳ giao tiếp thời gian thực nào. Ngay cả ở tốc độ ánh sáng, giao tiếp giữa trái đất và sao Hỏa mất khoảng 20 phút.
Liệu Sứ mệnh Mars One có thực sự xảy ra hay không là câu hỏi lớn mà nhiều người đang đặt ra. Có một sự hoài nghi rất lớn trong cộng đồng khoa học, và tạp chí Wired đã cho sứ mệnh này một số điểm thảm hại là hai trên mười trên thang xác suất của nó. Tuy nhiên, đối với những người mơ ước được lên sao Hỏa, ít nhất họ có thể nói rằng có khả năng điều đó có thể xảy ra.
Read the text carefully then decide whether the statements are true (T) or false (F).
Spending your free time on the Internet can be fun. You can chat, share photos with friends, and play online games. But some people are addicted to the Internet. They just can’t turn it off. Being online for many hours at a time does not mean you have a problem. The Internet is very useful. Online, you can pay your bills, buy clothes, and read the news. There are many good reasons to spend time online. However, people with an Internet addiction are online too much. They don’t spend time with their friends and family. Instead, they spend their time chatting with their Internet friends, people they have never met in real life. Some also play online games all day or night. Some people with Internet addictions even leave their jobs so they can spend even more time online! People with Internet addictions don’t just go online to shop, have fun, or do work. People who have this problem often go online because they want to escape the stress and problems in their lives. Many internet addicts stop caring about their real lives, and focus only on their online lives. One way Internet addicts can get help is by using special software. This software controls how much time someone can spend online. It tells the computer to turn off the internet after a certain amount time. This helps people focus on real life. The software’s goal is to teach people to use the Internet for good reasons and not just as an escape.
1. People with Internet addiction spend most of their free time on the Internet.
2. Paying bills online is a useful way to use the Internet.
3. Internet addiction causes problems in one’s daily life.
4. Most Internet addicts play online games all day or night.
5. Using special software is a way of helping people stop their Internet addiction.
The passage below contains 10 errors. UNDERLINE and CORRECT them.
After an absence in thirty years, I decided visiting my old school again. I had expected to find changes, but no a completely different building. As I walked up the school ground, I wondered for a moment if I had come at the right address. The grimy, red brick fortress with their tall windows that had looked up grimly on the playground and playing fields had swept away. In its place stood a bright, modern block risen from the ground on great concrete stilts. A huge expanse of glass extending across the face of the building, and in front, there was a well-kept lawn where previous there had been untidy gravel yard.
The city where I live has a bad ________ because of its high crime rate.
A. reputation
B. reputative
C. reputed
D. reputing
Tìm và sửa lỗi sai: It was not until the match ended that everybody had left the stadium.
“It was nice of you to help me. Thank you very much.", Tom said to you.
=> Tom thanked _______.
Jim was absent from class yesterday. He was suffering from a bad cold.
=> ____I must have my suit cleaned before the interview.
=> I ____________.
Read and choose the best answer.
Parents send their children to school to prepare for the time when they grow up. Children learn their native language so that they will be able to communicate fluently with other people around them. Moreover, they can preserve the valuable culture and literature of their country. They learn foreign languages in order to benefit from other countries’ heritage. The more foreign languages they learn, the more benefits they get. Children also learn math to calculate, geography to know about nature, and history to know about human beings and historical events. Nearly everything they study at school has some practical uses in their life.
1. Parents send their children to school to ________.
The remark was so unexpected that she did't know what to say.
=> It was such __
In all the world, there _________ (be) only 14 mountains that ________ (reach) above 8,000 meters.
Đề bài: Read the text carefully, then choose the correct answers.
More than two hundred years ago, the term 'environmental pollution was quite strange to people. They lived healthily, drank pure water, and breathed fresh air. Nowadays, the situation is quite different. People all over the world are worried about things that are happening to the environmental pollution. Actually it is man that is destroying the surroundings with many kinds of wastes. Everybody knows that motorbikes and cars emit dangerous gases that cause poisonous air and cancer, but no one wants to travel on foot or by bicycle. Manufactures know that wastes from factories make water and soil polluted, but they do not want to spend a lot of their money on treating the wastes safely. Scattering garbage is bad for our health, but no one wants to spend time burying it. Is it worth talking a lot about pollution?
More than two hundred years ago _____________
