A、Have the strong will to succeed. B、Listen to their parents and teachers. C、Believe in themselves. D、Get rid of their bad habit

Jaime Escalante was considered one of the best teachers in the United States. He taught math and science in his home country for 12 years. In the 1960s, Jaime Escalante and his wife came to the United States. During the next several years, he learned to speak English and repeated his college education and teacher training. In 1974, Mr. Escalante was hired at Garfield High School to teach mathematics. The school was in a poor area of Los Angeles, California. (32)Many of the students had serious problems with illegal drugs, gangs and violence. The school was in danger of losing its official approval to operate. The students of school were mostly Mexican-Americans from a Spanish-speaking area of the city. (32)Many were the worst students at the school and thought to be "unteachable." But Mr. Escalante pushed the group to work hard. He told them basic math was too easy and that they had the ability to do harder work. He told his students that he believed in them, (33)but they must have the desire to be successful. Jaime Escalante started an advanced math program with a small group of students. (34) Advanced Placement is a program of college-level classes and tests. In 1982, 18 of his students took the Advanced Placement test in calculus. They all passed. Officials at the testing company suspected the students of cheating. Mr. Escalante protested. (35)He said the students were being rejected because they were Mexican-Americans and from a poor school. He urged his students to take the test again. 12 of the students repeated the test. And again, all of them passed.
32. Why were many of the students in Garfield High School thought to be "unteachable"?
33. What must the students do if they want to achieve success according to Mr. Escalante?
34. What can be inferred about Advanced Placement?
35. Why did the officials suspect the students of cheating according to Mr. Escalante?