问题描述：
.The possible benefits of cloning are numerous , for______ producing human tissues and organs for transplant, and for preserving endangered animal species to name but two.
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考点提示：副词,副词的比较级,疑问副词,连接副词
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| A |
| 略 |
最佳答案：
题目：.The possible benefits of cloning are numerous , for______ producing human tissues and organs for tr
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