1.我们应该尽力去保护环境. We should ____________to protect the environment.2.昨天的会上学生们问了很多问题.Many questions _________by students at yesterday＇s meeting.3.新加坡是一个讲英语的国家,所以它也是一个练习英语的好地方.Singapore is an English-speaking country,so it＇s also a good place to ________.4.中国人民正在努力赶上发达国家.The Chinese people are working hard to ____________developed countries.

1.我们应该尽力去保护环境. We should ____________to protect the environment.
2.昨天的会上学生们问了很多问题.
Many questions _________by students at yesterday＇s meeting.
3.新加坡是一个讲英语的国家,所以它也是一个练习英语的好地方.
Singapore is an English-speaking country,so it＇s also a good place to ________.
4.中国人民正在努力赶上发达国家.
The Chinese people are working hard to ____________developed countries.