Question

Small computers need small amount of power, _______ means you use less electricity.?

A. what　B. that?

C. which D. as?

Answer 1

C?

解析:

as和which都可以引导非限制性定语从句，指代前面整句话的内容。本题只需要在C、D两项中选择。as引导非限制性定语从句，并在从句中作主语时，其后面的谓语动词一般是连系动词。如果从句谓语动词是行为动词，则必须用which。