阅读理解

B

       When people go to the movies today, they can watch and listen to a story. But when the movie first appeared (出现) many years ago, there was no sound or music. Those silent (无声的) movies play an important role in movie history.

         When movie theatres showed silent movies, musicians were often there to play music along with the movie. Sometimes, musicians also made some special sounds. However, there was no sound in the movie itself. People learnt the story through the actors, the musicians and words on the screen. When movies first had sound, not everyone liked it. Many silent movie actors thought it was hard to act in the new kind of movies. Clara Bow was a famous silent-movie actress in the early 1920s. She was so nervous (紧张的) about her voice  that she couldn't become a star in the world of talking pictures. She then left show business (演艺界).

          The Jazz Singer (1927) was the first movie with sound. Talking pictures became a big success, and there were more and more movies like that. Later, silent movies became history.

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某凸透镜焦距是10cm，将物体放在离焦点5cm的地方，所成的像（ ）

    It was Sunday yesterday. The weather was fine. It was sunny and there were no clouds in the sky. Sandy and Sue got up early in the morning. Now they were in the park. It is a big park and it's so beautiful. They saw many people there. Some boys played football on the grass. Some girls danced under the tree. An old man walked beside the lake. A young woman and her little son looked at the fish in the lake. How happy they are!