aa~! trouble !(6)
说一下原因吧
what did you do last Friday?
I did nothing but ____.
A.to watch TV
B.watch TV
C.watching TV
D.watched TV
参考答案:what did you do last Friday?
I did nothing but _B___.
A.to watch TV
B.watch TV
C.watching TV
D.watched TV
注意：but（除了）前面若有实义动词do的某种形式，则后面动词用原形；若没有的话，则用to + 动词原形。就这么简单！
e.g. I did nothing but go to sleep.
I had no choice but to go home.