has后面加什么冠词

　　The country has a poor record on human rights.

　　这个国家人权记录不佳。

　　The information has been placed in the public domain.

　　这资料不受版权保护。

　　He has carried out extensive research into renewable energy sources.

　　他已经对再生能源进行了广泛研究。

　　The Internet has become part of everyday life.

　　互联网已成为日常生活的一部分。

　　He has made a good recovery but still tires easily.

　　他已康复得不错，但仍然容易感到疲劳。