---MrSmithspentasmuchtimeashe___

发布时间：2020-07-10 09:47:42

---Mr Smith spent as much time as he ________ the experiments．---No doubt he succeeded in the end．













A.could do












B.could to do











C.could doing











D.could on doing

网友回答

C解析本题涉及到spend time(in)doing sth．和as much…as one can结构．
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