下列句中加横线成语使用不恰当的一项是(    )

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过12个字。

    俄国教育家乌申基说：“好习惯是人在神经系统中存放的道德资本，这个资本在不断增值，使人终生享受它的利息。坏习惯是无法偿还的道德债务，这种债务以不断增长的利息折磨你。

①____。”由此看来，好习惯是前进路上的加油站，坏习惯是②____。习惯支配人生，习惯的好坏决定人生的成败，真可谓③____。

根据短文内容，选择正确答案。

     Dabing and Xiaowei usually go to school by car. They drive past a cinema, a supermarket and a toy shop. The toy shop is next to the supermarket. Yaya and Xiaoli usually go to school by bus. They go past a bank and a post office. The bank is next to the post office. Longlong usually goes to school by bike. He passes by a police station, a library and a swimming pool（游泳池）.

—I saw a snake___ on the road on my way home.         

读澳大利亚自然带分布图，和①处自然带的形成无关的因素是（    ）