1 . Avoiding eye c________ is not advised when you are having a conversation. Instead, look directly at each other to show your politeness.(根据首字母单词拼写)

2 . Then in the 1990s, at the Super Bowl, a Mexican sauce made with avocados called guacamole was advertized. After this, avocados’ ________ （受欢迎程度）soared. （根据汉语提示完成句子）

3 . A ________ is a very bad accident such as an earthquake or a plane crash, especially one in which a lot of people are killed.(根据句意填空)

4 . The top_________________ (种类) in terms of sales during the shopping carnival(购物狂欢节) were rice, oil, mobile phones, refrigerated supplies, and daily and cleaning necessities. (根据汉语提示单词拼写)

5 . Raw m__________ including steel, oil, coal and minerals are used in the primary production or manufacturing of goods. (根据首字母单词拼写)

6 . ________ are rectangular blocks of baked clay used for building walls, which are usually red or brown. (根据句意填空)

7 . ________ is energy, especially electricity, that is obtained in large quantities from a fuel source and used to operate lights, heating, and machinery. (根据句意填空)

8 . It’s our duty to leave a better, cleaner and healthier planet for our children, so effective _________ (措施) are badly needed to maintain the ecological balance. (根据汉语提示单词拼写)

9 . If there is a ________, a large amount of water covers an area which is usually dry, for example when a river flows over its banks or a pipe bursts. (根据句意填空)

10 . The true ________ of the festival, the spirit of honesty, loyalty and patriotism, should never fade as time goes by. (根据句意填空)