1 . The books on the desk, of ________ the covers are shiny, are prizes for us.

2 . He gave me his advice, some of ______ was very useful. (用适当的词填空)

3 . He wrote many children’s books, nearly half of ____ were published in the 1990s.

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

5 . Mr Smith, from ________ I have learned a lot, is a famous scientist. (用适当的词填空)

6 . In our school there are 50 students, half of __________ wear glasses. （用适当的词填空）

7 . She has two sons, both of________are doctors. (用适当的词填空)

8 . John invited about 40 people to his wedding, most of ________ were family members. (用适当的词填空)

9 . It’s difficult for him to forget the accident________which he never recovered. （用适当的词填空）

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