问题描述：
英语单选题,定语从句
By using your eyes you can tell the direction ______ light comes .A in which .B from which.
为什么选b 不选a 答案解释是因为有come from 但是也有in the direction
By using your eyes you can tell the direction ______ light comes .A in which .B from which.
为什么选b 不选a 答案解释是因为有come from 但是也有in the direction
问题解答：
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