SAT几道改错题求助

题目

SAT几道改错题求助
At the age of seventy-one,legendary country music artist JC astonished his fans by performing a song that the rock group Nine Inch Nails orginally (has recorded).
为什么has recorded 错了?怎么改?
Today in class we discussed the common,but mistaken,assumption that when two people are no longer dating they are incapable (to be )friends.
为什么to be 错了?怎么改?
A great gray owl (flying low) across a forest clearing,its (wings beating) quietly and its ultrasensitive ears turned to the faint sounds made by smalll creatures concealed under leaves.
我觉得wings beating 错了,beating 应该改成beat才能和and后面平行,为什么答案写的是flying low错了?
（Determined to) make a name for herself as a writer of short stories,Helen never submits anything to an editor until (revising) it several times.
我选的是determined to,为什么错的是revising?determined 不应该改成determing么?

答案

第一题 改成 had recorded,这个乡村歌手astonished他的fans 是一般过去,因为他表演了一首 一个摇滚乐队原创的歌曲 (摇滚乐队record 是在乡村歌手表演之前--过去的过去,该用过去完成时) .
第二题,be capable of doing是固定搭配,没有 be capable to do 的用法 (PS.be able to do是对的)
第三题,按照你的说法的话,意思是 "随着一只猫头鹰飞过林中空地,它的翅膀拍打and它的耳朵转向..."; 但是这句话 翅膀咋样是个很小的概念,耳朵干啥是个 很具体的 比较重要的概念,所以 按照答案,and作为连词 连接两句话,前半句是 "随着它的翅膀安静的拍打,一只猫头鹰飞过林中空地" and后半句是 "它的超敏感耳朵转向隐藏在叶子后面的小生物们发出的细小的声音"
第四题,determine有个特殊的用法就是 sb be determined to do,所以A没错; until 不和doing连用,尤其这里讲的是一种 一般事实,应该改为 until she revises it.