单项选择题

The Chinese satellite is supposed to return to the earth______.

A．within 16 months
B．soon
C．in 6 months’ time
D．on Thursday
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单项选择题
From the passage we know that the author______.
A．thinks that scientists are about to achieve artificial intelligence
B．doubts whether scientists can ever achieve artificial intelligence
C．does not think that scientists have found real artificial intelligence
D．is sure that scientists have achieved artificial intelligence
单项选择题
How long does the training period last
A．About three weeks.
B．At least half a year.
C．Two years or more.
D．Two to four months.
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