Question

Sandy could do nothing but ________ his teacher that he was wrong．

[　　]

A．admit

B．admitted

C．admitting

D．to admit

Answer 1

答案：A
解析：

Sandy除了认错以外别无它法．动词不定式在介词but;后面，如果介词前面有行为动词do的某种形式，则介词后面的不定式符号to省略。