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It’s more than 8 years since I         a teacher.
A.becomeB.has becomeC.becameD.becomes
C

试题分析:句意:自从我成为一名老师以来,已经八年多了。Since后多接一个时间点,表示自……以来,结合语境可知下文从句描述的是过去某时的动作,故用一般过去时态,选C。
点评:英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型,首先要注意句子中的时间状语,如果没有则要通过分析上下文,结合语境来判断句子的时态。英语疑问句中一般具有时态上的对应关系,注意结合这一特点进行区分。
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