This dog is well trained ---she’ll come running back to me every time I ( ) to her. ( 章节：5 难度：3)
- A、whistle
- B、whistler
- C、whistled
- D、whistling
正确答案:A
答案解析:有
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This dog is well trained ---she’ll come running back to me every time I ( ) to her. ( 章节：5 难度：3)
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