单项选择题

In the sunlight, the coolest clothes would be （）

A．yellow
B．black
C．green
D．white

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单项选择题

Which is the main idea of this passage（）

A．Dark-colored clothes are warmer in the sunlight.
B．Objects absorb part of the sunlight.
C．Color is caused by reflected light rays.
D．A red object reflects mostly red light.

单项选择题

Things that look black are reflecting （）

A．mostly black light
B．all light
C．many different colors
D．no light