A．Marie benefited a lot from the practical lessons.
B．Marie was able to read stories with the help of her son.
C．Marie decided to continue her studies in school.
D．Marie found her lessons more challenging than her children’s.

A．Industries in the past and at present.
B．Changes in the development of industries.
C．The protection of industrial workers and customers.
D．The freedom of industries today and in the past.