求解两道语法题

shinozhu

2001年10月
19.(Early) signs (characteristic) of the acute phase of viral hepatitis in (adults) are abdominal pain,nausea,and (feverish) often accompanied by chills.

feverish虽然不对，但characteristic作为主语与are搭配，也应该为复数啊。

38.(Different fourteen) crops were (being grown) 8600 years (ago) by some of the world's earliest (farmers)

.Different fourteen虽然不对.但一眼看上去being grown与过去时8600 years (ago) 搭配总是不对。新东方语法笔记上也不是说有明显过去时态，必用过去时吗？

michael_wind

19题：characteristic在此是作后缀形容词短语，不是名词，如果是名词，那sign就不能是复数，谓语动词也不对了。
38题： 我如何觉得different fourteen crops是对的啊，没问题？

jeff2003

38、应该为fourteen different。
这里是用被动的过去进行时。