He wants to do nothing but his homework.A. finishingB. finishedC. to finishD. finish

问题补充：

He wants to do nothing but his homework.

A. finishing

B. finished

C. to finish

D. finish

答案：

A. finishing

B. finished

C. to finish

(答案→)D. finish

解析：but 介词后可以跟不定式作宾语，但如果前有do 不定式要省略to.