聽下面一段獨白，回答第12至第15四個小題。
（1）What can the students see on the third floor？
A.The inventions in the old days.
B.The inventions of the 20^th century.
C.Some inventors' pictures and their life introduction.
（2）What can they do on the fourth floor？
A.Watch movies.
B.Have a drink.
C.Search the Internet.
（3）Where is the gift shop？
A.In the north of the museum.
B.In the west of the museum.
C.In the east of the museum.
（4）Who might be the speaker？
A.A teacher.
B.A student.
C.A museum guide.