The scientist does not study nature it is useful to do so．He studies it because he takes pleasure in it．( )A．untilB．thoughC．becauseD．unless 题目和参考答案——青夏教育精英家教网——

题目内容

16．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

分析这个科学家研究自然不是因为这样做有用．他研究自然是因为从中得到了快乐．

解答答案C．until直到…为止；though虽然；because因为；unless除非．由于后半句的because he takes pleasure in it可知和前面形成结构对称关系．所以选C．

点评本题考查从属连词的用法．连词的用法辨析，要注意分析主从句之间的关系，再确定相应的连词，同时注意不同的连词的语义及用法区别．本题尤其要注意错误选项unless的选择，unless相当于if…not，容易误选D．

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