1 . The English version of the book contains nearly 50 poems. The focus of the poems is on the parent-child relationship. (用关系代词或副词合并)
____________________________________________________________________________

2 . 我们从温哥华出发，在那儿我们取到我们这次旅行的交通工具——一辆房车。(where引导非限制性定语从句)
We started from Vancouver, ________________.

3 . 他是一个忠实的倡导者，强烈倡导使用清洁能源，如太阳能、风能等，而不是使用那些污染我们环境的能源。（advocate，应用定语从句）
He is a devoted advocate, ________clean energies such as the energy of the sun, the wind and etc. ________using whose that pollute our environment.

4 . He spent 18 years cycling along the streets and earned nearly 350,000 yuan. All of it was donated to many schools.（现在分词短语做状语及非限制性定语从句）（句型转换）