单项选择题

Among the traffic lights, red light is placed （）

A．at the bottom
B．in the middle
C．at the top
D．below the green light

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热门试题

单项选择题

One is considered as a color blind man if （）

A．he can see the difference between red and deep red
B．he can see the difference between blue and green
C．he can't tell the difference between orange and green
D．he thinks green is the same as blue

单项选择题

The idea of this article is that （）

A．birds are important in our lives
B．animals are important in our lives
C．nature is important in our lives
D．Audubon was especially interested in birds