Question

英语好的来！！！

帮忙翻译几个被动语态的句子
1.the oldest pieces of paper still existed were made in about 150AD
2.for over 500years the art of making paper was limited to China
3.it was not produced there until the year 900
4.kites were known in China about 3000 years ago

Answer 1

1 现存的最古老的纸张实在约公元前150年制造的。
2 造纸术被局限于中国长达500多年的时间。
3 直到公元900年，它才在那里生产出来
4 3000年前，风筝就已将在中国被人们熟知。