scientists haw learned a lot about the universe.there is much we still don't know．( )A．OnceB．SinceC．ThoughD．Unless 题目和参考答案——青夏教育精英家教网——

题目内容

3．__________scientists haw learned a lot about the universe，there is much we still don't know．（　　）

A．

Once

B．

Since

C．

Though

D．

Unless

分析尽管科学家已经了解了很多有关宇宙的知识，但是，我们仍然还有很多不知道的．

解答答案：C A项意为"曾经，一旦"，表示时间；B项意为"既然，自从"表示时间或条件；C项意为"尽管，虽然"表示转折；D项意为"除非"表示条件．由we still don't know可知，此处意思是转折，故选C项．

点评考查让步状语从句．做此类题目，主要要弄清句意及所给连词的意思．

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