The genetic engineering, ______ progress has been very rapid recently, is perhap
题型：不详难度：来源：
The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．| A．to which | B．with which | C．in which | D．for |
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答案
| C |
解析
| 考查定语从句。have rapid progress in在……有迅速的进步，故用in which，选C。 |
举一反三
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