1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

What comes to your mind when you think of music in Austria? You might think of Mozart or the film The Sound of Music, but Austrian music started off quite     1     (different).

One of the earliest types of Austrian music may not seem like music at all. Yodelling, a form of singing that alternates (交替) in pitch (音高) between low and high,     2     (be) thought to have begun as a way for animal owners in the mountains     3     (call) their animals. Even today, yodelling     4     (use) in pop, rock and country music.

In the 18th century the Austrian royal family drew many famous musicians to Vienna, making     5     a centre for musical innovation and performances. Some classical composers even used     6     (tradition) Austrian folk songs or tunes in their works.

Opera has also been popular in Austria. Not only rich Austrians     7     regular citizens flooded into Vienna to attend performances. Even today, there are operas     8     (perform) every year at the St. Margarethen Opera Festival, in a very unusual location: a quarry (采石场). They all take place in the open air under the stars,     9     (take) advantage of the quarry’s unique acoustics (音响效果).

Austria has a long and rich musical history, from folk songs and dances     10     classical symphonies and operas. The sounds of Austrian music are everywhere.