【英语1级听力】到哪里去注射流感疫苗？-Where's My Flu Shot?

（单词翻译）

Flu shots cost $20 at the drugstore. Only a few people are buying the flu shots. There are no long lines. No one is waiting in line. If you want the flu shot, pay $20. You don't have to wait in line. You can get the flu shot immediately. The mayor¹ announced free flu shots. He said, "We will give free flu shots to everyone. Come to the library on Saturday." On Saturday 2,000 people went to the library. They stood in line for four hours. After four hours, there were no more free flu shots. They ran out of free flu shots. The drugstore still has many flu shots. But the flu shots at the drugstore aren't free. They cost $20.