She thinks the naughty students have escaped being punished by their teacher, __________?

Is this the piano _______ your familoy for over eighty years?

I cut my finger.—You should ________.

I’m putting on weight. The doctor has warned me to sugar.

填入下面横线处的句子，最恰当的一句是（3分）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种种问题的重要原因。接待能力若不提高，再美的湖光山色也会黯淡无光， ，再好的微笑服务也会丧失魅力。