问题
选择题
---I thought you had planned to practise the piano today.
---No. I did nothing but _____ computer games all day.
A．to play
B．play
C．played
D．playing
答案
答案：B
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。