单项选择题

What are salicylates

A．Leaves and tree bark.
B．The chemical in aspirin.
C．Aspirin tablets.
D．A Greek doctor.
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单项选择题
The development of silent reading during the nineteenth century indicated ______.
A．a change in the status of literate people
B．a change in the nature of reading
C．an increase in the number of books
D．an increase in the average age of readers
单项选择题
Educationalists are still arguing about ______.
A．the importance of silent reading
B．the amount of information yielded by books and newspapers
C．the effects of reading on health
D．the value of different types of reading material
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