题目内容：

 

1.在许多大城市共享单车能使人们自由地到处旅行又无污染。

In many big cities, ________ bikes can make people travel around freely without _________.

2.一架海南航空公司的客机于2016年7月13日在诸碧礁新建机场成功地着陆并返航。

A plane from Hainan Airlines _________ and flew back _________ at the newly-built airport of Zhubi Reefs on July13th, 2016.

3.毫无疑问在南海采集可燃冰将给中国提供大量的清洁能源。

There is no doubt that collecting the flammable ice at South China Sea will _________ China with a large amount of _________ energy.

4.由中国建设的肯尼亚蒙内铁路于2017年5月31日开通运行，它开启了非洲的世纪梦想。

Mombasa-Nairobi Railway Line in Kenya built by Chinawas put into use on May 31st, 2017 and it started the _ century _________.

5.每一个中国人都应该记住4月15日是国家安全日。

Every Chinese should _____________ that the National ____________ Day is on April 15th.