--- I thought you had planned to practice the piano today.--- I did nothing but ____ letters all day.A.write B.to write C.wrote D.writing

Question

--- I thought you had planned to practice the piano today.--- I did nothing but ____ letters all day.A.write B.to write C.wrote D.writing

Answer 1

介词but 作为 “除了”的意思时 省略 介词but 前若有实义动词do ,其后的不定式不带to （如 前面没有do 则but后要加to） 根据句意便是 我什么都没有做除了 写了一天的信 前面存在实义动词did 则but后的不定式不带to 即为write