题目内容
Vitamin D gets produced when animals are exposed to direct sunlight, for＿reason, it
is always advisable to give them chances to spend time in the sun.
| A．whose | B．that |
| C．which | D．its |
C
解析试题分析：考查定语从句。句意：当动物直接接触阳光时维生素D 就会产生，因为这个原因，给他们适合的时间去晒太阳是非常明智的。Which代指上面这个原因，故选C项。
考点 : 考查定语从句
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| A．Before | B．Where | C．Unless | D．Until |
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| A．Now that | B．After | C．Although | D．As soon as |
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| A．that | B．when | C．where | D．which |
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| A．its | B．which |
| C．where | D．whose |
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| A．on which | B．to which |
| C．with which | D．in which |
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| A．that | B．which | C．what | D．where |