【简答题】 Food safety is considered to be an important public health issue that has caused governments all over the world to 1. ______________ to improve it. However, foodborne diseases are a 2. _________ gro...
【单选题】Questions 20 and 21 are based on the following news. At the end of the news item you will be given 20 seconds to answer the questions. Now listen to the news. A police spokesman said the devices wer...