61.buildings , a lot of 表许多,后接复数形式,building是名词 建筑加s表复数;
62、reporter, 在报纸工作,所以是填职业;
63、using, by是介词后加动词ing形式,表通过什么方式;
64、visited, yesterday是昨天,所以用过去时;
65、missing, is后加ing,表示现在的状态,现在失踪了。
希望可以帮到您。
buildings
reporter
using
visited
missing
and spent the first hours of their business lives sweeping out the office. I notice we have
61.buildings
62.reporter
63.using
64.visited
65.missing
66.Thousands of students
祝学习进步,天天向上!