2. 从业资格
  3. _______ your valuable help, we couldn't

_______ your valuable help, we couldn't

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问题 _______ your valuable help, we couldn't have finished the experiment ahead of time.A．If it were not forB．Had it not been forC．Were it not forD．If it has not been for
选项 A．If it were not for
B．Had it not been for
C．Were it not for
D．If it has not been for
答案 B
解析 考查虚拟语气。根据语境可知是与过去事实相反，如果省if，句子要倒装，倒装时要将助动词提前，故选B。
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中学英语学科知识与教学能力

教师资格笔试

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