All the preparations for the task ____,we were ready to startA completedB completeC had been completed D have been completed 为什么选A呢?选C不行吗,直接用过去完成时?
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![All the preparations for the task ____,we were ready to startA completedB completeC had been completed D have been completed 为什么选A呢?选C不行吗,直接用过去完成时?](/uploads/image/z/9221805-45-5.jpg?t=All+the+preparations+for+the+task+____%2Cwe+were+ready+to+startA+completedB+completeC+had+been+completed+D+have+been+completed+++++++%E4%B8%BA%E4%BB%80%E4%B9%88%E9%80%89A%E5%91%A2%3F%E9%80%89C%E4%B8%8D%E8%A1%8C%E5%90%97%2C%E7%9B%B4%E6%8E%A5%E7%94%A8%E8%BF%87%E5%8E%BB%E5%AE%8C%E6%88%90%E6%97%B6%3F)
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