[求助]PP语法求解，谢谢！

wch2001_akuan

87. The piano  (as it)  is known today represents
   (a long series ) of experiments  (extend) back
   to the year 1711, or perhaps (even earlier.)


答案是C ， 但是B 好象也不对？ 应该改为 a long serie ?

98. The Hopi, (descendants) of the ( prehistoric) Anasazi
   people, are (a ) Pueblo( people who) of the southwestern
   United States.
答案是D， 如何改？

128. Small to medium-sized (marsh) birds similar in
    body shape (by) cranes, rails are found (throughout)
    the world, (except) in the polar regions.
B 错，为什么？

redpassion

1。series这个单词单数就是这样的，遇到一定是有s的，没有就错~~
2。who不要
3。一时说不上来，但是by出现前面90%有过去分词
不好意思，呵呵

braveMBA

3、感觉B用of 比较好。