单项选择题

One cause of eyestrain mentioned in the passage is （）.

A．wearing contact lenses too long
B．going to the movies
C．reading a lot
D．not visiting your eye doctor

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单项选择题
The new game called Sphairistike appeared in （） in 1873.

A．America
B．Europe
C．Bermuda
D．Egypt
单项选择题
22（）

A．take
B．try
C．form
D．allow
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