— What a shame ! It turned out to be a failure.— We missed a process,_______ we could not succeed in the experiment.A.and otherwiseB.and thereforeC.or perhapsD.but luckily
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B解析试题分析:考查连词,and otherwise意思“否则”,and therefore意思“因此”,or perhaps意思“或许”,but luckily意思“但是幸运的是”,句子意思“我们丢失了做事方法,因此我们将不会做试验成功”考点:考查连词
点评:连词是常考内容,要知道它们的意思,遇到连词题时,就很容易做出正确选择