Scientists still wonder whether cloning will help or harm us and where it ____ u
题型：不详难度：来源：
Scientists still wonder whether cloning will help or harm us and where it ____ us.| A．has led | B．is leading | C．had led | D．would lead |
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答案
| B |
解析
| 考查时态。Lead的现在进行时表将来。句意：科学家想知道克隆对人类有害还是有益它要引领我们去何方？ |
举一反三
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