单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．It was one of the first tools.
B．It developed human intelligence.
C．It led to the invention of machines.
D．It was the key to the success of mankind.
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单项选择题
A．You have to prove the failure of your marriage.B．No need to claim wrongdoing by the other spouse.C．The other spouse agrees to dissolve the marriage.D．The other spouse is a drag user.
A．You have to prove the failure of your marriage.
B．No need to claim wrongdoing by the other spouse.
C．The other spouse agrees to dissolve the marriage.
D．The other spouse is a drag user.
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