Read the following paragraphs and tell where the main idea is located
— A. Despite the hatred that most people feel toward cockroaches, they do help humans in several ways. For example, they are perfect experimental animals and are used for scientific research in the laboratory. Breeding them is easy, for they thrive under almost any conditions. In studies on nutrition and food, cockroaches are good subjects because they will eat any kind of food. They can be used to study heart disease, and cancer researchers work with roaches because they grow cancerous tumors like those that are found in humans.
1) in the first sentence
2) in the last sentence
3) in the middle of the paragraph
4) in two sentences of the paragraph
— B. Making a study schedule is one important step in becoming a successful student in college. Students should schedule one hour of study time for every one hour of class time. At exam time, more study time may be necessary. Also, students must study in an appropriate place. It is important to study in a quiet place away from the distraction of other people and such things as the television and the radio. Students should find a comfortable place with plenty of space for all the necessary study supplies. Then, students need to study the information in small amounts. It is a good idea to learn the required concepts slowly and thoroughly instead of trying to learn everything on the evening before the exam. Students who want to be successful in college should remember these three helpful study strategies.
1) in the first sentence
2) in the last sentence
3) in the middle of the paragraph
4) in two sentences of the paragraph, the first sentence and the last sentence.
— C. Television can be an excellent teacher for everyone from very young children to the oldest of viewers. Television entertains young children with sights and songs. Television provides company for older viewers who are stuck at home with no one to talk to. New immigrants can learn English just by turning on the television. All viewers can keep informed on the latest events around the world by watching the news. While there are many great things about television, there are also many bad things. Over time, television shows have begun to show more and more violence, death and murder. The bad language and profanity on some shows make them unsuitable for families. The number of shows which deal with sex outside of marriage also shocks many viewers. And these terrible scenes are sometimes copied by young, impressionable viewers.
1) in the first sentence
2) in the last sentence
3) in the middle of the paragraph
4) in two sentences of the paragraph
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