单项选择题

The passage implies that the telegraph cable was built mainly ()

A. for oceanographic studies
B. for military purposes
C. for business considerations
D. for investigating the depths of the oceans

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单项选择题

Tuition for attending the university in the United States is ()

A. inexpensive
B. high
C. free from charge
D. costless

单项选择题

What can be inferred about the baggage boys()

A. They could earn much, but they had to work hard.
B. Many of them earned money in a dishonest way.
C. They were all from poor families.
D. They were all thin, young boys.