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题目
题型:不详难度:来源:
Jack could have avoided that terrible car accident, but he ________ careful enough.
A.is notB.was notC.hasn’t beenD.hadn’t been

答案
B
解析
考查时态。根据could have avoided可知本句是对过去所发生情况的虚拟,but后面使用陈述语气,所以使用过去时。句意:Jack本可以避免那可怕的事故,但是他不够小心。
核心考点
试题【Jack could have avoided that terrible car accident, but he ________ careful enou】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
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A.are prepared B.have prepared
C.are preparingD.will prepare

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A.isB.wasC.areD.were

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---You _____me about your travels in Canada.
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