题目内容：

1.许多动物都处于灭绝的边缘。

Many animals are ___________________ extinction(灭绝).

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.

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.

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 ____________.

5.据我所知，他们将在下个月回来。

___________________, they will come back next month.