1 . Last summer, I visited the beautiful leaning tower, ________ is eight floors high, each having a round on columns, rising one above another.（用适当的词填空）

2 . My husband, ________ is on a business trip to Rome all this week, sent me this postcard. （用适当的词填空）

3 . Meanwhile, they exchange ideas and feelings with each other, through ________ they probably acquire more knowledge.（用适当的词填空）

4 . People eat dumplings on the Eve of Chinese New Year, ________ is a tradition handed down from generation to generation. （用适当的词填空）

5 . We all look forward to the Spring Festival, _______ we meet or visit our friends and relatives.（用适当的词填空）

6 . ________ most people believe, if one’s words are not consistent with his deeds, he would easily lose the faith of others. (用适当的词填空)

7 . Owing to our efforts, our class won first prize in the end, ________ we thought was the most significant gift for our school. (用适当的词填空)

8 . Some musicians give performances in pubs or on the street, ________ which they are paid in cash. (用适当的词填空)

9 . Tango is a passionate dance, _______ brings the dancers together in a way that words can't express. （用适当的词填空）

10 . Carefulness, without ________ you can't work well, is a kind of quality. （用适当的词填空）