What does the author imply about the raw materials used to make glass?
A.They were the same for centuries.
B.They are liquid.
C.They are transparent.
D.They are very heavy.

The word “customarily” in paragraph 2 could best be replaced by “______”.
A.naturally
B.necessarily
C.usually
D.certainly

What must be done to release the internal stresses that build up in glass products during manufacture?
A.The glass must be reheated and evenly cooled.
B.The glass must be cooled quickly.
C.The glass must be kept moist until cooled.
D.The glass must be shaped to its desired form immediately

The word “induced” in paragraph 2 is closest in meaning to_______.
A.joined
B.missed
C.caused
D.lost

According to the passage, why can glass be more easily shaped into specific forms than can metals
A.It resists breaking when heated
B.It has better optical properties.
C.It retains heat while its viscosity changes.
D.It gradually becomes softer as its temperature rises.

The passage mainly discusses music that was­­­­­­­ ____________.
A.performed before the showing of a film
B.played during silent films
C.recorded during film exhibitions
D.specifically composed for certain movie theaters

What can be inferred that the passage about the majority of films made after 1927?
A.They were truly “silent”.
B.They were accompanied by symphonic orchestras.
C.They incorporated the sound of the actors’ voices.
D.They corresponded to specific musical compositions.

The word “them” refers to _________.
A.years
B.hands
C.pieces
D.films

According to the passage, what kind of business was the Edison Company?
A.It produced electricity.
B.It distributed films.
C.It published musical arrangements.
D.It made musical instruments.

It may be inferred from the passage that the first musical cue sheets appeared around _______.
A.1896
B.1909
C.1915
D.1927