___________there are many different types of food, some animals spend their live
题型：不详难度：来源：
___________there are many different types of food, some animals spend their lives eating only one type.| A．Since | B．Unless | C．Once | D．While |
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答案
| D |
解析
试题分析：考查连词：A. Since自从B. Unless除非C. Once一旦， D. While虽然，当…时候，句意：虽然有很多不同类型的食物，一些动物一生只吃一种食物。选D。
点评：首先掌握各种连词的含义和作用，在做题时要弄清上下文的逻辑关系。 |
举一反三
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