C．up D．off
D [考查动词短语。on上车；over恢复；up起床，建造，打扮；off从……下来。从飞机上下来后，看到现代城市非常兴奋。故选D。]
13．A.discipline C．scenery
B．diamond D．summary
C [考查名词词义。discipline纪律，训练；diamond钻石，菱形；scenery景色；D.summary摘要。悉尼的景色非常漂亮。故选C。]
14．A.brought C．hesitated
B．allowed D．treated
D [考查动词用法。brought带来；allowed允许；hesitated犹豫；treated对待，招待。treat sb.to sth.招待某人吃某物。故选D。]
15．A.ate C．had eaten
B．eat D．was eating
C [考查动词时态。“That was the first time I had done sth.”固定句型“这是我第一次做某事”，从句用过去完成时。故选C。]
16．A.must C．may
B．shall D．might
A [考查推理判断。must必须；shall会，将要；may可能；might可能(过去式)。根据句意，虽然是第一次吃龙虾，但不得不说确实很好吃。故选A。]
17．A.beside C．except
B．besides D．for
C [考查介词用法。 beside在……旁边；besides此外(暗含包含在内之意)；except除……之外；for为了，因为。由后文可知，我一直玩得很开心除了最后一天，因为本打算游船，却遇上下雨，只能留在宾馆。故选C。]
18．A.floated C．spent
B．contacted D．remained
D [考查动词词义。floated浮动；contacted接触，联系；spent花费；remained保持。因为下雨，我们一整天都待在宾馆聊天。故选D。]
19．A.bus C．ship
B．train D．plane
B [考查细节理解。bus公共汽车；train火车；ship船；plane飞机。由文中的“because the ticket was cheaper and also we could enjoy the scenery outside the train windows”可知，回去时没有坐飞机，而是坐了火车，因为票价便宜并且可以看风景。故选B。]
20．A.brilliant
B．enthusiastic
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C．energetic D．annoying
A [考查形容词词义。brilliant精彩的，杰出的；enthusiastic热情的；energetic精力充沛的；annoying讨厌的。由前文可知，这次澳洲之行非常精彩。故选A。]
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