补写出下列名篇名句中的空缺部分。

①子曰：____，勿施于人。

②先天下之忧而忧，____（范仲淹《 岳阳楼记》）

③长风破浪会有时，____（李白《行路难》）

④蒹葭苍苍，____。（《诗经•蒹葭》）

⑤海内存知己，____（王勃《送杜少甫之任蜀州》））

⑥俱往矣，____，____。（***《沁园春•雪》）

先化简，再求值：5（3a²b﹣ab²）﹣（ab²+3a²b），其中 $a=\frac{1}{2}$ ， $b=\frac{1}{3}$ ．

Saturday，March 24th
    We have arrived in the hot, wet city of Bangkok. This is our first trip to Thailand(泰国). All the different smells make us want to try the food. We are going to eat something special for dinner tonight. The hotel we are staying in is cheap, and very clean. We plan to stay here for a few days, visit some places in the city, and then travel to Chiang Mai in the North.
Tuesday, March 27th
    Bangkok is wonderful and surprising! The places are interesting. We visited the famous market which was on water, and saw a lot of fruits and vegetables. Everything is so colorful, and we have taken hundreds of photos already! Later today we will leave for Chiang Mai. We will take the train north, stay in Chiang Mai for two days, and then catch a bus to Chiang Rai.
Friday，March 30th
    Our trip to Chiang Rai was long and boring. We visited a small village in the mountains. The village people here love the quiet life -- no computers or phones. They are the kindest people I have ever met. They always smile and say “hello”. Kathy and I can only speak a few words of Thai, so smiling is the best way to show our kindness. I feel good here and hope to be able to come back next year.