单项选择题

Why do the workers wear thick glasses

A．Because they can’t see.
B．Because the weather is very hot.
C．Because they will keep their eyes saf
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单项选择题
The writer feel too tired to drive any further because it was too dark for him to go on driving.
A．Right.
B．Wrong.
C．Doesn’t say.
单项选择题
How many cows has the man got
A．Three.
B．Five.
C．More than fiv
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