单选题 The journey should only take about 30 minutes, but ______ it usually takes an hour.
A. in turn B. in general C. in time D. in fact

【正确答案】 D
【答案解析】[解析] 本题考查的是介词短语的意义辨析。“in turn”意为“轮流”。“in general”意为“总体上…”。“in time”意为“及时”。“in fact”意为“实际上”。故D正确。