The correct option for the sentence "The bridge connecting the two cities was .... by the enemy" is A. blown up. Explanation of the Correct Answer

1. Understanding the Phrase "Blown Up":
2. The phrase "blown up" means to destroy something using explosives. In the context of the sentence, it indicates that the enemy used explosives to demolish the bridge. This is a common expression used in military and conflict scenarios where structures are intentionally destroyed.
3. Contextual Relevance:
4. The sentence refers to an action taken by the enemy against a bridge, which is a strategic target in warfare. "Blown up" fits perfectly because it conveys the idea of deliberate destruction, which aligns with the actions typically associated with an enemy in a conflict.

Why the Other Options Are Incorrect

• B. Blown Down:
• "Blown down" typically refers to something being knocked over or destroyed by strong winds or a force, rather than by an explosive action. While it could imply destruction, it lacks the specific connotation of intentional demolition by an enemy. Therefore, it is not the best fit for the context of the sentence.
• C. Blown Off:
• "Blown off" usually means that something has been detached or removed from its place due to wind or an explosion. It does not convey the idea of complete destruction. For example, you might say a roof was "blown off" during a storm, but this does not imply that the entire structure (like a bridge) was destroyed. Thus, it is not appropriate for this context.
• D. Blown Over:
• "Blown over" suggests that something has been toppled or knocked over, again typically by wind. This phrase is more commonly used for lighter objects or structures that can be easily overturned. It does not imply the complete destruction of a bridge, making it unsuitable for the sentence.

Summary of Key Points

• Correct Answer: A. blown up (indicates intentional destruction using explosives).
• Context Matters: The action described is military in nature, making "blown up" the most appropriate choice.
• Other Options:
• B. blown down (implies destruction by wind, not explosives).
• C. blown off (suggests detachment, not complete destruction).
• D. blown over (implies toppling, not suitable for a bridge).

Revision Summary

• "Blown up" means to destroy with explosives, fitting the context of enemy action.
• "Blown down," "blown off," and "blown over" do not convey the same meaning of intentional destruction.
• Always consider the context of the sentence when choosing the best option.