问题
选择题
| So carefully ____ the performance that it went smoothly in the competition. |
| A. have we prepared B. had we prepared C. we have prepared D. we had prepared |
答案
答案：B
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| So carefully ____ the performance that it went smoothly in the competition. |
| A. have we prepared B. had we prepared C. we have prepared D. we had prepared |
答案：B