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第一节: 单项选择 (共15小题；每小题1分，满分15分)
从A、B、C、D四个选项中，选出可填入空白处的最佳选项。
21. Mary is often heard ________ playing piano in the next room in the evening.
A. practise B. to practise C. practising D. practiced
22.Violence (暴力) computer games may have a bad ____________ on children.
A. affect B. pressure C. influence D. power
从A、B、C、D四个选项中，选出可填入空白处的最佳选项。
21. Mary is often heard ________ playing piano in the next room in the evening.
A. practise B. to practise C. practising D. practiced
22.Violence (暴力) computer games may have a bad ____________ on children.
A. affect B. pressure C. influence D. power
