S4. What’s the main idea of Paragraphs 4 and 5

A．By talking to an expert.
B．By reading an article.
C．By attending an exercise class.
D．By listening to the radio.

A．She says she doesn’t mind if the man carries the case.
B．She is angry when the man offers to carry the case.
C．She refuses the help.
D．She thanks the man and accepts his offer.