单项选择题

Modern industry must have developed()

A. before the Middle Ages     
B. in Greece or Rome
C. around the 19th century     
D. machines to take tests

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单项选择题
39()

A.families 
B.homes 
C.factories 
D.offices
单项选择题
According to the passage, the two students failed in their study because of their()

A. shyness
B. pride
C. self-doubt
D. laziness
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