Question

改错it was during /the 1990's that /the friendship

between Edward andJeremy reached their/ highest /point.画斜线前面是要改的

Answer 1

it was during /the 1990's that /the friendship between Edward andJeremy reached their/ highest /point.
画斜线前面是要改的

应该是：
it was during the 1990's that the friendship between Edward andJeremy （had） reached their highest point.
意思是：
就是在1990年代，Edward 和Jeremy的友谊（程度）达到了顶点。
理由：
这是一个强调句型，强调时间，还原为正常语序是：
The friendship between Edward andJeremy （had） reached their highest point during the 1990's
句子中有during带的时间，通常是完成时的标志，现在离那个时间已经很久，是过去完成的事情，故用过去完成时。

追问

有没有看清题，是画斜线部分前要改的

追答

每个斜线前都要改的话，应该是：
it was in the 1990's when the friendship between Edward andJeremy reached its the highest point.
意思是：在1990年代，Edward 和Jeremy的友谊（程度）达到了顶点。