More historical buildings in the old town will fall down ________we try our best
题型：不详难度：来源：
More historical buildings in the old town will fall down ________we try our best to protect them.| A．if | B．since | C．unless | D．in order that |
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答案
| C |
解析
试题分析：句意为：如果我们不尽力保护，老城里更多的历史性建筑将倒塌。if：如果， since：自从……以来， unless ：如果不， in order that：为了。结合语境可知应故选C。 |
举一反三
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