III.课文表层理解 快速阅读课文，判断正(T)误(F)

1．John Snow knew that cholera was not able to be controlled until its cause was found.

2．The first theory suggested that people took cholera into their bodies with their meals.

3．John Snow was once frightened to face the challenge and solve the problem of cholera.

4．The people who had been given free been and not drunk the water from the pump were not attacked by the disease.