My friend Max started to play football ______ he was seven years old.A．sinceB．wh
题型：不详难度：来源：
| My friend Max started to play football ______ he was seven years old. |
答案
| B |
解析
试题分析：since由于，自从……以来；when考虑到，当……时；if 是否，如果；while然而，当……时。句意：在他七岁的时候，我的朋友马克思就开始踢足球了。While引导时间状语从句强调主从动作的同时发生，从句多用进行时态，结合语境可知选B。
点评：连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词。连词的用法都比较多，语义之间还有交叉，熟记其基本应用规则，了解其区别，注意固定搭配对象，是做好此类题型的关键。 |
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