放一只狗-愈发

sc2015

语法题：

For many years, while xx 部落人生活的时候，they have felled..., have done1..., have done2..., have done3..., and have done4...
A) 同上
C) fell..., did1..., did2..., did3..., and
注：done1, done2, done3 表示几个不同动词的过去分词；同理，did1,did2等表示过去式； 最后的done4过去粉刺和过去式是一样的

记住的与机经不同的仅此