Gosh. No, not recently, give or take millions of years ! Given how far apart they are now any connection between Africa & South America then would have been unrecognisable.
All have, at least, numerous tributaries and the links below will give details.
Zaire was once part of the Belgian Congo, then briefly after that, part of Congo.
Belgain Congo present day name is Democratic Republic of the Congo.
There is no country called Congo. The Democratic republic of the Congo was once Zaire, and before that the Belgian Congo. The ancient Kingdom of Congo included bits of Angola, Cabinda, DR Congo and the Republic of Congo. But British, no.
Congo
Zaire
Congo
ZAIRE
The Congo River, also known as the Zaire River
zaire
Democratic Republic of Congo
The nation of Zaire is now known in English as the Democratic Republic of the Congo. The name has been changed several times. In the past it has been called the Republic of Zaire, Congo Free State, the Republic of Congo, and Belgian Congo. There was a time when the nation was divided in two and those two parts were known as Congo-Leopoldville and Congo-Brazzaville.
yes you idiot! every river has to flood once in a while...