Read the article and select the best answer. Article: The largest-ever chariot pit of relics with carts and horse bones has been discovered in Henan Province. It may lead to the uncovering of chariot pit groups that could be a key to understanding Chinese civilizations that existed more than 2,000 years ago. Experts said the relics are dated more than 300 years earlier than the famous warriors in Shaanxi Province. What excited the experts were two other projects that located two huge pits with similar features. "It is absolutely a miracle. These relics indicate that there could be a tomb group in this area, which is likely to be important for China's archaeological studies," said Ma Juncai, a leading relic researcher in the province. In ancient China, carts, sheep, spoons and so on were buried to ensure that dead people had a happy afterlife. The number and quality of the sacrifices indicated the social status of the dead. The custom was carried into the Qin Dynasty. Emperor Qinshihuang's tomb, located near Xi'an, the capital of Shaanxi Province, is accompanied by thousands of wood or clay figures of warriors and horses. The tomb is probably the most well-known. The discovered pit measures 10.4 meters long, 8.4 meters wide and 5 meters deep. It holds 20 carts in different sizes. The smallest one is 1.05 meters long and 1.3 meters wide. Experts think that 40 horses are likely to be found as well. Careful plans need to be made to deal with the demanding uncovering. "The clay is very weak and a small misstep can destroy the whole project. That's why we need to take every step very carefully to protect these cherished cultural relics," Ma said. Question: Careful plans for the uncovering are needed because _ . Options: A: another 40 horses are likely to be found as well B: the whole uncovering could be destroyed easily C: experts are too busy to spare time for it D: the government hasn't agreed to it
B

(Question)
Read the article and select the best answer. Article: Every year, millions of Americans see their personal information leak into the wrong hands. Maybe there's spyware on the their computer, or a service they use suffered a security reach, leaving customers at the risk of exposure. Or perhaps their password is easy to guess. Don't fear: You can easily set up proper defenses. Here's how. * Clean Your Computer and Smartphone Before you put new security measures into place, make sure your devices are as spotless as possible. This means installing a good antivirus program and taking the time to clear out any spy -- or malware that may have already infected your system. These days, it's also worth it to make sure your phone is safe from viruses. Iphones are less likely to be targeted by spyware, but Android users should download the Lookout app to scan their devices and ensure everything is as it should be. * Secure Your WiFi. It's fairly easy for potential criminals to gain access to your information if they're able to share your connection -- that's why you want to be careful when using public WiFi. Even though you put security measures into place a couple of years ago, it's a good idea to refresh your settings. * Use passwords What you've heard is true: Passwords should use a variety of special characters, numerals, letters, and cases when possible. * Check the shopping security Take care when shopping online. Always check the security symbols when using an online site for shopping. If the lock icon encryption is not there, do not give out credit details. Also, check that the site is legal -- never go to a site from a random email and start shopping online. Keep a separate credit card just for online shopping. This will make it easier to cancel if something bad does happen and your other credit card for "in real life" can still be used uninfluenced. Don't store information on any store's website. It may be convenient but it's also a possible loss to you if the site is hacked. Question: To put new security measures into place, we need to _ . Options: A: clear out everything in the system B: make a random selection of network C: get rid of potential spyware D: refresh the infected system
(Answer)
C

Read the article and select the best answer. Article: Since the 1970s, scientists have been searching for ways to link the brain with computers.Brain-computer interface(BCI) technology could help people with disabilities send commands to machines. Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated a small robotic wheelchair directed by a person's thoughts. In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand.He could even talk as he watched the vehicle and guided it with his thoughts. "Our brain has billions of nerve cells.These send signals through the spinal cord to the muscles to give us the ability to move.But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles," Tavella says."Our system allows disabled people to communicate with external world and also to control devices." The researchers designed a special cap for the user.This head cover picks up the signals from the scalp and sends them to a computer.The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path.They help the computer react to commands from the brain. Prof.Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands."The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices.One example is this wheelchair." He says his team has set two goals.One is testing with real patients, so as to prove that this is a technology they can benefit from.And the other is to guarantee that they can use the technology over long periods of time. Question: BCI is a technology that can _ Options: A: help to update computer systems B: link the human brain with computers C: help the disabled to recover D: control a person's thoughts
B