The new policy allows a couple to have a second birth _____either is an only ch
题型：不详难度：来源：
The new policy allows a couple to have a second birth _____either is an only child.| A．though | B．if | C．unless | D．until |
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答案
| B |
解析
试题分析：句意：新政策允许一对夫妇生二胎，如果其中有一人是独生子女的话。这里用if引导条件状语从句，A. though虽然，引导让步状语从句， C. unless除非，如果不，引导条件状语从句，until直到，引导时间状语从句，所以选B。 |
举一反三
______ I admit that there are quite a few problems, I don"t agree that they cannot be solved. | A．Supposing | B．Since | C．While | D．As |
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I can judge which part of China you come from you open your mouth.| A．while | B．the moment | C．since | D．every time |
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