BFor a 400-year-old art form, operas had a bad fame: overweight actresses singing the word

B
For a 400-year-old art form, operas had a bad fame: overweight actresses singing the words which are hard to understand in one of those romance languages you were supposed to learn in high school. And with tickets costing as much as $ 145 a performance, opera goers also have a certain appearance in people’s mind: rich, well-dressed and old.
But now opera panies around the country are loosening their ties and kicking off their shoes in an attempt to bring the opera to the audience. It needs to keep it alive, the young and not-so-rich.
Opera producers have found that to attract this crowd, they need to make the opera closer to mon people. That means no formal suits, old-styled theatre or band-breaking ticket prices. And because young people don’t or won’t e to the opera, panies are bringing the opera to them, giving performances in such unusual places as parks, libraries and public schools.
The Houston Grand Opera’s choice is the public library, where it performs “mobile operas”, shortened versions (剧本) of child-friendly operas. This summer’s production is Hansel & Gretel. By performing smaller versions of large productions, producers are able to make people interested while keeping costs at a reasonable level. The San Francisco Opera, which will be celebrating its 75th anniversary this year, is staging Cinderella free of charge, keeping costs down by employing students from its Young Artists’ Training Program.   
45．Which is the main idea of this passage?
A．Opera is famous for its long history.                                  
B．Opera is only performed for rich people.
C．Young people are not interested in opera.                              
D．Opera panies are trying to keep opera alive.
46．The underlined phrase “loosening their ties and kicking off their shoes” (paragraph 2) means     .
A．breaking up the old rules                      B．changing the formal suits
C．making the audience at ease                  D．advertising themselves
47．The San Francisco Opera Company employs student actors in order to     .
A．celebrate its 75th anniversary                B．reduce the cost
C．attract young people                             D．make Cinderella popular
48．From the passage we can infer that     .
A．the tickets for operas are very expensive                               
B．operas are performed in a difficult language
C．operas are not so popular an art form today                           
D．students enjoy performing operas very muchD