单项选择题

The number of voluntary blood donors in Beijing in 1993 is ______.

A．more than 30 000
B．more than 15 000
C．more than 28 000
D．more than 14 000
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单项选择题
When the writer first went to the Red Cross clinic in Beijing to donate his blood he was surprised ______.
A．how he was treated by the people there
B．what a good habit blood donation is
C．that donors only gave 200 ml each time in China
D．that most Chinese people were willing to donate blood
单项选择题
The word that in Line 3, Para. 4 mostly probably means ______.
A．becoming a volunteer
B．having relatives
C．donating blood
D．saving people's life
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