单项选择题

In Paragraph 1, "sentient things of our own making" refer to ________.

A．extraterrestrial beings
B．human beings
C．our sense organs
D．mechanical devices made by man
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单项选择题
Which is the topic sentence of the passage
A．The first sentence of the passage.
B．The third sentence of the passage.
C．The last sentence but one of the passage.
D．The last sentence of the passage.
单项选择题
The best title for this passage is ________.
A．There Is No End to the Drug Plague
B．Let's Get Tough with Drug User
C．We Must Crack Down on Drug Supplies
D．Everyone Is A Victim of Drug Use
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