题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。The important thing in life is to have a great goal and the determination to attain it. Living without a goal is like 【1】 (sail) without a compass. Lack of purposes is the cause of most of【2】(failure). When a great aim has been decided on, determination and persistence are most important.What separates the successful from the unsuccessful is persistence. The persistence is【3】 (necessity). If you are persistent, you will succeed. When Ludwig van Beethoven 【4】 (reach) his pea钟面上时针长6厘米，时针尖端一昼夜所走的路程是（　　）厘米．A．37.68B．18.84C．75.36D．452.16