题目内容
---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
C
解析：
本题涉及到spend time(in)doing sth．和as much…as one can结构．
解析：
本题涉及到spend time(in)doing sth．和as much…as one can结构．
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