问题
选择题
| So sudden _____ that the enemy had no time to escape. |
| A. did the attack B. the attack did C. was the attack D. the attack was |
答案
答案：C
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| So sudden _____ that the enemy had no time to escape. |
| A. did the attack B. the attack did C. was the attack D. the attack was |
答案：C
，求
和
的度数。