3 . The Chinese painting brush is mostly made of goat, wolf or fox hair, ________ is suitable for producing brushes that are both soft and stringy (有韧性). (用适当的词填空)

4 . In addition, every student can be in harmony with foreign friends, ________ makes it easy for you to get along with them. (用适当的词填空)

8 . The story centers around the deep friendship between poet Gao Shi and the romantic poet Li Bai offering a brief look into the glorious history of the Tang era, ______is known for its economic prosperity and cultural advancement. (用适当的词填空)

9 . A closer encounter with the Great Barrier Reef’s impressive coral gardens reveals many extremely amazing underwater attractions, ________ include the world’s largest collection of corals, coral sponges, rays, dolphins, over 1,500 species of tropical fish, more than 200 types of birds, etc. (用适当的词填空)