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1. We demanded that we __________ of any change in the plan. A) informed B) would be informed C) be informed D) had been informed 2. It’s necessary that he _________ a recognized qualification. A) has B) have C) had D) having 3. It's high time we ____________ our attention to this problem. A) turned B) turn C) had turned D) would turn 4. If only you __________ him what I said! Everything would have been all right. A) didn't told B) hadn't told C) would not tell D) would have not told 5. He must have had an accident, or he____________ here then. A) would have been B) had been C) should have been D) could be 6. Much labour would have been saved if the electronic computers_____________ before. A) had invented B) were invented C) should have been invented D) had been invented | 
