Questões de Inglês - Sinônimos | Synonyms para Concurso

Read the text below and answer the questions that follow.
When is it time to stop studying?
It's 10 p.m. and six government employees are out checking the streets of Seoul, South Korea. But these are not police officers searching for teenagers who are behaving badly. Their mission is to find children who are still studying. And stop them. Education in South Korea is very competitive. The aim of almost every schoolchild is to get into one of the country’s top universities. Only the students with the best grades get a place. The school day starts at 8 a.m. and the students finish studying somewhere between 10 p.m. and 1 a.m. at night. This is because many go to private academies called hagwon after school. Around 74 percent of all students attend a hagwon after their regular classes finish. A year’s course costs, on average, $2,600 per student. In Seoul, there are more private tutors than schoolteachers, and the most popular ones make millions of dollars a year from online and in-person classes. Most parents rely on private tutoring to get their children into a university. With so much time spent in the classroom, all that students in South Korean high schools do is study and sleep. Some of them are so exhausted that they cannot stay awake the next day at school. It is a common sight to see a teacher explaining the lesson while a third of the students are asleep on their desks. The teachers don’t seem to mind. There are even special pillows for sale that fit over the arms of the chairs to make sleeping in class more comfortable. Ironically, the students spend class time sleeping so that they can stay up late studying that night. The South Korean government has been aware of the faults in the system for some time, but now they have passed some reforms. Today, schoolteachers have to meet certain standards or take additional training courses. However, the biggest challenge for the government is the hagwons. Hagwons have been banned from having classes after 10 p.m., which is why there are street patrols searching for children who are studying after that time. If they find any in class, the owner of the hagwon is punished and the students are sent home. It's a strange world, where some children have to be told to stop studying while others are reluctant to start. Adapted from: LATHAM-KOENIG, Christina & OXENDEN, Clive. American English File 3 - Workbook. 2"“ edition. Oxford: OUP, 2014.
In the sentence “However, the biggest challenge for the government is the hagwons.” (last paragraph), the word HOWEVER could be correctly replaced in this context, without change of meaning, by:

Check the alternative with the words that correctly replace the underlined words below. “Bullying is when a person is picked on over and over again by an individual or group with more power, either in terms of physical strength or social standing.”

The underlined word, in the following sentence:’ don’t use up natural resources or harm the environment.’, has its correct synonym in which alternative?

ANABOLIC STEROID ABUSE
 Since the 1950’s, some athletes have been taking anabolic steroids to build muscle boost their athletic performance. Increasingly, other segments of the population also have been taking these compounds. An anual survey of drug abuse among adolescents showed a significant increase from 1998 to 1999 in steroid abuse among middle school students. During the same year, the percentage of 12th-graders who believed that taking these drugs causes “great risk” to health, declined from 68 percent to 62 percent.
 Studies show that, over time, anabolic steroids can indeed take a heavy toll on a person’s health. The abuse of oral or injectable steroids is associated with higher risks for heart attacks and strokes, and the abuse of most oral steroids is associated with increased risk for liver problems. Steroid abusers who share needles or use non-sterile techniques when they inject steroids are at risk os contracting dangerous infections, such as HIV/AIDS, hepatites B and C, and bacterial endocarditis. 
Anabolic steroid abuse can also cause undesirable body changes. These include breast development and genital shrinking in men, masculinization of the body in women, and acne and hair loss in both sexes. 
[...]  We hope that this compilation of scientific information on anabolic steroids will help the public recognize the risks of steroid abuse. 
Alan I. Leshner, Ph.D. Director National Institute on Drug Abuse www.nida.nih.gov
Check the meaning of the word in bold.
 - The abuse of steroids is associated with risks for heart attacks and strokes.