Complicated _____ it is, the problem can be solved in only two hours with an electronic computer.
考试：军队文职人员招聘
科目：英语言文学 (军队文职)（在线考试）
问题：
A：though
B：even though
C：even if
D：as
答案：
解析：
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Complicated _____ it is, the problem can be solved in only two hours with an electronic computer.
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