Question

complete os espaço do texto com there was ou there were

...many children who died of poliomyelits before Sabin created his polio vaccine. ...another scientist called Jonas Salk, who also contributed to the eradication of poliomyelits. ... a big diference between Sabin's and Salk's approaches. ... live polio viruses in Sabin's vaccine. Salk's vaccine had dead polio viruses​

Answer 1

Resposta:

there were ,there was , there was , there were

Answer 2

Resposta:

There were

There was

There was

There were