( ) about it earlier, we could have warned people of the danger.
举一反三
- Had they been warned of the possible danger, they ______. A: may have escaped B: could have escaped C: must have escaped D: can have escaped
- Five minutes earlier, __________ we could have caught the last train.
- The passage suggests that we could have learned much more about our past than we do now if the ancient people had ___________ .
- _______, we would have prevented the catastrophe. A: Had we known it earlier B: If we knew it earlier C: Did we know it earlier D: Unless we had known it earlier
- According to the author, what kind of danger is the most fearful for today’s people? A: The natural disaster. B: The uncertain danger. C: The microwave foods. D: The quantifiable danger.