——每年有多少人旅游？
——也许当我们正讨论的时候，全球就有超过100架飞机起飞。
—How many people travel every year?
—P____when we are talking about it, more than 100 planes have taken off around the world.
答案
erhaps
知识点：副词的用法
也许perhaps，因此正确答案为Perhaps。
略
WORD格式（
