题目内容

— 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
B

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”
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
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