The goals that gave the Catholics three points were scored by Gui, at 21 minutes, and Lindala, at 82, in a game played in the province of Uige.
In the other match on Sunday, Wiliete of Benguela and Bravos of Maquis drew 2-2.
Wiwi, at 55 seconds, opened the scoring for the Bravos do Maquis, who increased the result in the 30th minute, by Zico.
Three minutes later, at 33, Odilón reduced the difference, and at 81, Cristiano re-established the equality.
This Monday, the two main contenders for the title enter the field.
The leader Sagrada Esperança, with 64 points, travels to the province of Huambo to face Recreativo da Caála, while the second-placed Petro de Luanda, with 63 points, receives Kuando Kubango FC.
For the same round, Sporting de Cabinda hosts 1.º de Agosto, third ranked, with 55 points, while Interclube, of Ivo Campos, fifth placed, with 42, faces Libolo, of Paulo Torres, 12th, with 30.
Tiago Azulão, of Petro de Luanda, is the top scorer of the race, with 14 goals, followed by Dasfáa, of Interclube, with 11, and Mabululu, of 1.º de Agosto, with 10.
Results of the 28th round:
- Saturday, July 17:
Académica do Lobito - Ferrovia do Huambo, 0-0
Progresso Sambizanga - Desportivo da Huila, 2-1
- Sunday, 18 July:
Santa Rita - Baixa de Kassanje, 2-0
Wiliete de Benguela - Bravos do Maquis, 2-2
- Monday, July 19:
Interclube - Recreativo do Libolo
Sporting Cabinda - 1.º de Agosto
Petro de Luanda - Kuando Kubango FC
Recreativo da Caála - Sagrada Esperança
