1 . This semester our school offers many optional courses to the students. Each of them appeals to many students. (同义句转换)
→This semester our school offers many optional courses to the students, ________ . (定语从句)

2 . The students, all of   ________ spent the whole day picking fruits, were extremely tired. (用适当的词填空)

3 . I could see a group of around 20 Brazilian dancers and a band in fancy costumes standing in the street, some of __________ carried flags, which blew in the wind. (用适当的词填空)

4 . He issued a statement conflicting with the facts, to ________ we remained opposed. (用适当的词填空)

6 . The science of medicine, in_______ progress has been very rapid, is perhaps the most important of all the science.

7 . In the distance there is a hill, on the top_____ _____ stands a white temple. （用适当的词填空）

8 . Many lessons are now available online, _____ _____ students can choose for free. （用适当的词填空）

10 . I have forty books, most of ____________are about Chinese history and literature. (用适当的词填空)