单项选择题

The purpose of the writer in writing this passage is to ______.

A．explain the advantage of blood donation
B．stress the importance of blood donation
C．tell us his donation experience in China
D．encourage people to give blood freely

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热门试题

单项选择题

According to the writer, more and more Chinese are giving blood free because ______.

A．they know the advantage of blood donation
B．they have learned how to donate blood
C．they have realized its great significance
D．they know it's a way to show their generosity

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