【小题1】许多动物都处于灭绝的边缘。
Many animals are extinction(灭绝).
【小题2】学生把英语用来作为第一外语来学习。
English by the students as the first foreign language.
【小题3】众所周知，政府鼓励人们用布袋去购物。
It is well-known that the government go shopping with the cloth bags.
【小题4】在过去，人们的衣服都是用手工做的，一次只能做一件。
In the past people’s clothes were made one at a time .
【小题5】据我所知，他们将在下个月回来。
, they will e back next month.on the edge of
网友回答
(答案→)on the edge of
解析：
【小题1】处于……边缘 on the edge of...，固定短语。
【小题2】缺学习这个意思没有翻译，而学习和英语之间的关系是被动，基本结构be + done. 故填is studied/learned。
【小题3】鼓励人们做某事 encourage sb. to do sth. ,这里是鼓励人们去购物，encourage people to.
【小题4】手工制作 by hand 固定短语。
【小题5】据我所知，固定短语As far as I know