3 . China has many museums in _________ the collections of cultural relics are beyond count. It would be a pity if so many cultural relics and cultural heritages were only displayed in museum cabinets，lifeless and cold. (用适当的词填空)

5 . 我的好朋友不理会我，我伤心不已，孤独如同潮水般涌来。
a. My good friend just ignored me, ________. Loneliness began to flood in. (非限制性定语从句；upset adj.)
b. ________ that my good friend just ignored me. Loneliness began to flood in. (what引导主语从句；upset vt.)

6 . 众所周知，青岛是一个非常美丽的城市，一年四季既不太热也不太冷。(neither...nor...)
As is known to us, Qingdao is a very beautiful city, ________________ all year round.

10 . 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)