2. 外语
  3. Students or teachers can participate in excursions to lovely beaches around the island at regular

Students or teachers can participate in excursions to lovely beaches around the island at regular

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问题 Students or teachers can participate in excursions to lovely beaches around the island at regular
选项 A、gaps
B、rate
C、length
D、intervals
答案D
解析 at intervals每隔一段时间，每隔一段距离，如；She brought us coffee at intervals．gap空隙，缺口；间隔，差距；空档，空白，如：The trade gap between imports and exports remained high．rate速度；率；价钱，收费，如：She can read at the rate of 1000 words a minute．length长，任度。句意：学生或老师每隔一段时间就能参加去海岛周围的美丽海岸旅行的活动。
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