题文
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 |
推荐试卷
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 |
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