_____ a lot of small ads are put up on the walls, out city will be untidy.A．Unti
题型：不详难度：来源：
_____ a lot of small ads are put up on the walls, out city will be untidy.| A．Until | B．Though | C．If | D．Unless |
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答案
| C |
解析
试题分析：句意：如果有许多小广告被贴在墙上，我们的城市将会不清洁。分析：考查if 引导的条件状语从句，体现主将从现的原则，不洁净的条件是墙上被贴上了小广告。故选 C |
举一反三
None of the shoes in the shops are the right size. They are _____too big ____too small.| A．both, and | B．neither, nor | | C．either, or | D．not only, but also |
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_____ I was in the USA, I made a lot of friends there.| A．While | B．Although | | C．Unless | D．Until |
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| Daisy has been learning Putonghua __________ the age of five. |
| They missed the school bus, _____ they were late for class. |
-- Would you like to go to the concert with me?
-- I’d love to, _________ I’m afraid I have no time. |
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