Oil prices have risen by 32 percent since the start of the year, _______ a record US$57.65 a barrel on April 4. [ ]

Lucy is going to have difficulty finding a desired job ______ she graduates from a key university.

Leaves flying in the air, it _____ the old good days I spent in the mountain village.

What a rich dinner you’re preparing, mum! -I’ve been told that your aunt as well as her three friends _______to visit us.[ ]

填入下面一段文字横线处的语句，最恰当的一项是某一地区特定时间内游客数量超过其接待能力，是造成该地区旅游业出现种种问题的重要原因。若不提高其接待能力，再美丽的湖光山色也会暗淡无光， ，再动人的微笑服务也会丧失魅力。