Cloning plants is straightforward cloning animals is very complicated . A．so that B．although C．while...
2023-01-26 00:21:38 17次 2010年海南省高二下学期期末考试英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Cloning plants is straightforward cloning
animals is very complicated .
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A．so that
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B．although
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C．while
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D．as if
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