---I thought you had planned to practise the piano today.
---No. I did nothing but puter games all day.
A. to play
B. play
C. played
D. playing
网友回答
A. to play
(答案→)B. play
C. played
D. playing
解析：考查介词but前有动词do /does /did 时，but后要用不带to的不定式，句意：我原以为今天你已经计划练钢琴了。不，我什么也没做除了整体玩电脑游戏。所以选B。