.If _____,the experiment will be successful.A．carefully doingB．it done carefully
题型：不详难度：来源：
.If _____,the experiment will be successful.| A．carefully doing | B．it done carefully | C．carefully done | D．doing carefully |
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答案
| C |
解析
| 考查状语从句的省略。主语the experiment与do之间是被动关系，所以用过去分词done，句意：如果这个实验被认真做的话，它会成功的。carefully done前省略了it is，所以选C。 |
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