问题
选择题
| I visited Mr. Johnson during his stay in Shanghai _____ he attended a most important conference there. |
| A. when B. which C. where D. in which |
答案
答案：A
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| I visited Mr. Johnson during his stay in Shanghai _____ he attended a most important conference there. |
| A. when B. which C. where D. in which |
答案：A