问题
选择题
26．He never regretted the anxious hours he had had ______ for the missing papers．
A．search
B．searching
C．searched
D．to search
答案
答案：B
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26．He never regretted the anxious hours he had had ______ for the missing papers．
A．search
B．searching
C．searched
D．to search
答案：B