| 1. 难度：中等 | |
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—Stay a bit longer，please. It's been such ________fun having you here. —Thank you，but I've got ________early start tomorrow morning. A．/；the B．a；an C．/；an D．the；an
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| 2. 难度：中等 | |
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I can't say which wine is best---it's a(n)_______of personal taste. A. affair B. matter C. event D. variety
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| 3. 难度：中等 | |
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Our journey was slow because the bus stopped at different villages________． A. normally B. gradually C. constantly D. regularly
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| 4. 难度：中等 | |
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We will be free tomorrow，so I suggest ________to the history museum. A．to visit B. visiting C．we should visit D. a visit
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