改错题,下面的句子哪里错了Atatimewheninterestintwentieth-centuryclassicalmusicseemsonthevergetodisappear,theavantgardecompositionsofthe1960sand1970smanagetoretaintheirpopularity

Question

改错题,下面的句子哪里错了
At a time when interest in twentieth-century classical music seems on the verge to
disappear,the avantgarde compositions of the 1960s and 1970s manage to retain their popularity

Answer 1

这是一道SAT的ISE题目,在这题中固定搭配on the verge to appear错了,应改成 on the verge of disappearing.
on the verge of：濒临……