SECTION 1 Vocabulary Selection In the section, there are 20 incomplete sentences. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase which best completes each sentences. There is only ONE right answer. The streets of the Dual Springs neighborhood, a migrant-worker hub in northern Beijing, are ______ . That's no surprise more than 13,000 people have been quarantined in China's capital to halt the insidious spread of severe acute respiratory syndrome (SARS).