①学而时习之，不亦说乎？有朋自远方来，不亦乐乎？人不知而不愠，不亦君子乎？

②温故而知新，可以为师矣。

③学而不思则罔，思而不学则殆。

④知之者不如好之者，好之者不如乐之者。

⑤三人行，必有我师焉；择其善者而从之，其不善者而改之。

⑥吾十有五而志于学，三十而立，四十而不惑，五十而知天命，六十而耳顺，七十而从心所欲，不逾矩。

根据拼音写出相应的词语。
①一个人对于自己的职业不敬，便是xiè dú（         ）职业之神圣。   
②做一个公民，我们要kè jìn zhí shǒu （                 ）。
③十四岁的少女怀着一颗tǎn tè（         ）的心在思考着。
④有这种诗人灵魂的传统的民族，应该有qì tūn dǒu niú (                   )的表现才对。

    Why does the Leaning Tower of Pisa in Italy lean? It leans because of a mistake. It has leaned almost since the day the builders b____ it.
In 1774, the people of Pisa in Italy wanted to build a bell tower. They wanted the tower to be the m____beautiful bell tower in Italy. The city needed a bell tower because the church(教堂) did not have o____ . As soon as the first floor of the building was finished, the tower started to lean. Builders t____  to make the building straight again as they added more floors, but the leaning tower got w____ as the tower grew. It took about 180 years to finish the tower. Today, the leaning tower has eight f____  It is 54.5 meters t____. And it leans almost 4 meters to one s____ . The tower is also sinking(下沉) into the g ____ on which it was built. Every year, the tower leans a____ 1.7 cm.