There is an 80-metres-long swimming pool in his dream home改错
问题描述：
There is an 80-metres-long swimming pool in his dream home改错
答
an -a
There is a 80-metres-long swimming pool in his dream home
有元音字母的单词才用an
比如an English book
答
There is 'a' 80-metres-long swimming pool in his dream home
答
80-metre-long是一个复合形容词,其中的metre要用单数形式