11.All work is pleasant_ ______when the habit of working is formed.  A.done B.doing C.to do

问题描述:

11.All work is pleasant_ ______when the habit of working is formed.  A.done B.doing C.to do
11.All work is pleasant_ ______when the habit of working is formed.
  A.done B.doing C.to do D.to be done
选啥?为啥?

这个题的正确答案是C
不定式的主动表被动的一种情况.
“主语+be+形容词+to do”中,当主语是不定式的逻辑宾语时,要用主动表被动,相当于省略了逻辑主语for us,for you等.
建议你去查查相关内容,还有几种不定式主动表被动的情况.