Read the paragraphs and choose the correct topic. Autism is a complex developmental disorder that begins in childhood, usually before the age of three, and lasts throughout a person’s lifetime. It is common, affecting approximately one in ninety children born in the United States. In particular, autism affects the parts of the brain that control social interaction and communication. Autism affects people in a wide range of ways. In other words, a person may be affected very mildly or quite severely, and the symptoms may be different from person to person.

Choose the correct topic. Autism affects children in a variety of ways. Children may have trouble expressing their thoughts and ideas in words, and they may have trouble understanding ideas. They may also be extremely sensitive to certain sounds, or they may be bothered by physical contact. Symptoms may be mild or severe, depending on the child.

Choose the correct main idea. Cheating on university entrance exams has been a major problem in China recently, so authorities have created new systems to try to stop students from cheating. Every year, millions of students across the country gather in large halls to take the test. At most test cites across China, students must pass through airport style metal detectors to make sure they are not bringing in any electronic devices, including watches. Cameras have also been installed at test locations, broadcasting the testing to the offices of top local education officials. In some areas, hundreds of police are called in to patrol the testing.

Choose the correct main idea. Another principle of business success is Be responsible, both economically and socially. This means cutting back on unnecessary spending and finding ways to reduce harmful effects on the environment by recycling, reducing waste, and using natural materials. Being socially responsible means contributing something positive to the community and the world. For example, companies could support local or global charities.