Questions 23 to 25 are based on the conversation you have just heard.

A．After he bought his own print shop.
B．After he signed some historic documents.
C．When he invented the lightning rod.
D．When Pennsylvania Gazette became successful.

A．They may have to follow certain housing rules.
B．A deposit may be required to rent an apartment.
C．On-campus apartments are limited.
D．They have to devote all their time to the academics.