问题
选择题
Sandy could do nothing but ______ to his teacher that he was wrong.
A .admit B. admitted C. admitting D to admit
答案
答案：A
考查but的用法，此题中but为介词，它前面的是动词是do、did 、does，but后应用原形动词，若but前面是其它动词，but后应用to do，所以选A。
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