In 1620,forests c __ an area of about half the USA,and in 1850,on_英语解答

In 1620,forests c __ an area of about half the USA,and in 1850,only about a third

人气：135 ℃　时间：2020-02-05 16:43:22

解答

covered ,用过去式,覆盖的意思,句子中有表明过去的时间词,in 1620