3 . Sheng said a friend of his, the head of Beijing Tsinghua Chang gung Hospital told him that one of the biggest problems in dealing with COVID-19 was ________healthcare workers treating patients were getting infected themselves. Zheng said he wanted to do something to deal with this situation. (用适当的词填空)

4 . The fresh thin air, snow-covered mountains and graceful animals running on the plains are _______we’re here-to observe Tibetan antelopes, which are being hunted, legally, for their valuable fur. (用适当的词填空)

7 . Its unique taste of freshness, sourness, hotness and spiciness is ________ modern people and young people prefer. (用适当的词填空)

8 . Keeping dogs in a civilized manner is a slogan that everybody knows. The more important thing is ________ there are accompanying measures to put this slogan into practice. (用适当的词填空)

9 . If most of their customers are happy to buy larger quantities, that’s __________ they’ll promote. (用适当的词填空)

10 . “Explore and understand society in practice, and influence the people around us. That’s ______ the meaning of the project lies,” said Ding. (用适当的词填空)