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39. Why was McCormick sentenced to prison?
A. He sold bombs.B. He caused death of people.
C. He made detectors.
D. He cheated in business.
40. According to the judge, what McCormick had done _______.
A. increased the cost of safeguarding
B. lowered people's guard against dangerC. changed people's idea of social security
D. caused innocent people to commit crimes
41. Which of the following is true of the detectors?
A. They have not been sold to Africa.
B. They have caused many serious problems.
C. They can find dangerous objects in water.
D. They don't function on the basis of science.
42. It can be inferred from the passage that McCormick _______.
A. sold the equipment at a low price
B. was well-known in most countries
C. did not think he had committed the crime
D. had not got such huge profit as mentioned in the text
