Read the article and select the best answer. Article: We usually believe what our brain tells us, but there are some amazing facts which show that the brain tricks us. As a result, we think we can see something that is not actually there or we ignore things that actually are there. Scientists Daniel Simons and Christopher Chabris have researched this phenomenon , which they call "change blindness". Their experiments show how we sometimes just do not see what is in front of our eyes because _ . Here is one of their most famous experiments. In this experiment, the participants were shown a video of two groups of people (one group in white T-shirts and one group in black T-shirts) who passed basketballs around in a hallway. Each group had three members. Simons and Chabris asked the participants to count how many times the white team passed the ball. While the two teams were passing their balls around, a person dressed up as a big bear walked through the group and stopped to look at the camera. Simons and Chabris found that about half of the research participants did not notice the big bear. Question: What do Daniel Simons and Christopher Chabris do? Options: A: Scientists. B: Astronauts. C: Engineers. D: Directors.
A

Read the article and select the best answer. Article: Smog is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news interviewer with CCTV, discussed the questions in her documentary Under the Dome. The 103-minute film was on websites on Feb 28. In the film, Chai visits polluted places and talks to officials and scientists. She thinks that burning too much coal and oil are the main causes of PM2.5 and smog. To solve the problem, Chai suggests that we should clean our coal and oil or replace them with cleaner energy such as natural gas. In her film, Chai also emphasized that everyone can do something to help control smog too. For example, we can live a greener life by using more public transport. Or if we see things that could harm the environment, we can try to stop it. In the film, when she sees a restaurant cooking without any suitable filter facilities , she calls the hotline 12369. The restaurant installed the filter a week later. Chen Jining, the new minister of environmental protection, praised Chai. "This film encourages ordinary people to take notice of the environment. This is what we need in the future." Question: What can we tell from the story? Options: A: Only factories produce heavy smog. B: Only the government can control smog. C: Smog can't be controlled by ordinary people. D: Living a green life can help reduce smog.
D

Read the article and select the best answer. Article: Writer: Amy Gillett Price:$24.95Fare :$3.99(Ships from and sold by Amazon.com.) INTRODUCTION .................................9 Lesson 1: Bob's Day at Work...........................11 Lesson 2: Bob Returns Home with Bad News.........17 Lesson 3: Ted's Day at School........................23 Lesson 4: Nicole's Day at School.....................27 Lesson 5: Ted Goes Out for the Evening...............33 REVIEW: Lessons 1-5 .................................37 : Question: If Tom wants to buy this book from Amazon.com, he has to pay _ . Options: A: $3.99 B: $24.95 C: $20.96 D: $28.94
C