单项选择题

The figure of world illiteracy was obtained by（）

A．a committee of UNESCO
B．experts in Paris
C．an international organization
D．none of the above

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单项选择题

According to this passage, if you could not understand a passage, you （）

A．may not sit in the library
B．probably don't know its background
C．may not have practiced on reading it
D．probably think it is too easy for you to read