问题描述：
| I noticed a _____ change in his attitude to us. |
| [ ] |
| A. thin B. simple C. clever D. subtle |
考点提示：形容词
最佳答案：
| D |
最佳答案：
题目：I noticed a _____ change in his attitude to us. [ ]A. thin B. simple C. clever D. subtle
最佳答案：
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