单项选择题

A．An industrial trial in Spain.
B．Military trials in Spain and Sweden.
C．Industrial trials in Spain and Sweden.
D．A trial involving students at the University of Florida.
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单项选择题
It can be inferred from the passage that thousands of people in the US purchase sperm _____________.
A．without knowing its potential dangers
B．regardless of repeated warnings
C．for the reason of quality supply
D．for their desperate needs
单项选择题
A．A weight-loss surgery.B．A balanced diet.C．A change of life style. D．More exercise.
A．A weight-loss surgery.
B．A balanced diet.
C．A change of life style.
D．More exercise.
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