6. ____ might be expected, the response to the question was very mixed.
A)As B) That C) It D) What
7. It is useful to be able to predict the extent ____ which a price change will affect supply and demand.
A)from B) with C) to &n bsp; D) for
8. Living in the central Australian desert has its problems, ____obtaining water is not the least.
A)for which B) to which C) of which D) in which
9. The British are not so familiar with different cultures and other ways of doing things, ____ is often the case in other countries.
A) as B) what C) so D) that
10. We need a chairman ____.
A) for whom everyone has confidence B) in whom everyone has confidence
C) who everyone has confidence of D) whom everyone has confidence on

语法参考答案
6. A) 题意：这个问题的答案极为复杂，这一点人们可能已经预见到了。
解析：同题2。
7. C) 题意：能够预测价格变化将影响供需的程度是有益的。
解析：本题的测试点是介词的用法和介词+which/whom引导的定语从句。引导定语从句的关系代词除了做从句中动词的宾语外，还可做介词的宾语，这些介词常有：with 表伴随状态；of表部分与整体的关系；to表方向、目的；for表示对象；from表示来源。从本题可看出答案应与动词连用，指明预测的方向；且to…extent为固定介词短语，表到……的程度。故只能选C。
8. C) 题意：居住在澳大利亚中部的沙漠地区有许多问题，取水就是个不小的的问题。
解析：本题的测试点是介词的用法和介词+which/whom引导的定语从句。Lest做介词表示对介词of的选择，of 和which指代的先行词problems是所属关系。
9. A) 题意：英国人不太熟悉异文化和做事的其他方式，这也是其他国家常有的事。
解析：此句中只有as可引导非限定性从句。
10. B) 题意：我们需要一个人人都信任的主席。
解析：此句中have confidence in（对有信心/信任感）为固定短语，介词提前、先行词指人时只能为in whom。即介词+whom引导的限定性定语从句。