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第1题

20. John is busy ________ his girlfriend with her paper. A. to help B. helping C. help D. helps
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第2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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第3题

18. After he ______ the unforgettable failure of love, he became afraid of it. A. felt B. forgot C. met D. experienced
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第4题

17. We soon arrived _______ the airport. A. in B. at C. on D. to
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