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王老师:19139051760(拨打)
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第1题

2. Due to the heavy fog, the plane is delayed for its ________. (depart)
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第2题

1. It is time for ________ the plane. (board)
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第3题

20. John is busy ________ his girlfriend with her paper. A. to help B. helping C. help D. helps
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第4题

19. There is a ________ of two hours with the 7: 40 train. A. delay B. change C. schedule D. timetable
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