The Shanghai Composite index fell by 8.5%.The Shanghai Composite index fell 8.5%.The share price has risen by 8.5%.The share price has risen 8.5%.请问哪个 fall 和 rise 哪个是正确的?怎么判断用不用介词 by?
...The steps for the square dancing. 请问这个句子里的for有什么用法?可以改成for吗?④Old people like to square dancing.square dancing是广场舞的意思,这个句子中的square不是名词吗?为什么可以放在to后面?不是like to do sth.吗?谢...