问题
选择题
| They will fly to Washington, ____ they plan to stay for two or three days. |
| A. where B. there C. which D. when |
答案
答案：A
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| They will fly to Washington, ____ they plan to stay for two or three days. |
| A. where B. there C. which D. when |
答案：A
缺失，采用金属烤瓷桥修复，金属基底桥试戴完成后，需对金属基底进行处理