Question

4.  (2015江苏无锡锡山高级中学一模，23) The scientist does not study nature it is useful to do so. He studies it because he takes pleasure in it.

   A. until   B. though

   C. because   D. unless 

Answer 1

4. C

4. C句意:这位科学家研究大自然不是因为这么做有用，而是因为他 能从中获得乐趣。本题考查状语从句。until直到，引导时间状语从 句;though尽管，引导让步状语从句；because因为，引导原因状语从 句;unless除非，引导条件状语从句。根据题意可知选C项。