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
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单项选择题
Something looks yellow because it （）

A．absorbs mostly yellow light
B．reflects mostly yellow light
C．absorbs all light
D．reflects all light
单项选择题
______ during the war, the airport has never been used again.
A．Has damaged
B．Having damaged
C．Has been damaged
D．Having been damaged
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