1 . Recently I bought an ancient Chinese painting, the price of ________ was very reasonable. (用适当的词填空)

2 . He was then admitted to a key university, from ___________ he graduated with honors.(用适当的词填空)

3 . She is a talented English teacher, ________ whom we students can learn a lot. (用适当的词填空)

4 . Mr. White invited many friends to his birthday party, most of ________ are popular writers. (用适当的词填空)

5 . The event, ________ the novel is based, is of great significance in history. (用适当的词填空)

6 . She brought her three friends to the party, none of ________I had ever met before. (用适当的词填空)

7 . Many of the lessons are now available online, ________students can choose for free. (用介词+关系代词填空)

8 . Some young people, most ________were well-educated, chose to start up in business after graduation from university. (用介词+关系代词填空)

9 . She has many books, none ________which is interesting. (用适当的词填空)

10 . They finally climbed up the mountain,________ which many strange birds were seen. (用适当的词填空)