填空题

How many people are almost blind to all colors
There are （） people who are blind to all colors.

【参考答案】

very few

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单项选择题

What happened to the man（）

A．He hit a tree.
B．He hit a truck.
C．He hit a box.
D．He hurt his hea.

填空题

For those who are almost blind to all colors, what kinds of colors can they only see They can only see （）.

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