题目内容：
21. (填空题)Sometimes, you will never find out the wonder unless you try. The other day, I made up my mind to drive to South Carolina to meet my friends in my__36 car. Though I had only been there once before and did not know the__37 very well. I was on the highway after I had made some__38 . At Ashvelle, there was a crossroads where I could go on along the main road or I could take a short cut. The short cut was to 39__ several hills and was dangerous, I hesitated (锟斤拷豫)for a little while and then chose the main road, for I wanted to be 40__ . Something strange happened after I drove a long 41__ and found it was not the correct road that I wanted to 42__ , but the hilly road I decided to avoid. I realized that it was at the 43__ that I had made the 44__ mistake. 锟斤拷 What shall I do? 锟斤拷 I asked myself. If I went back to take that road again, it would be very late by the time I got to Columbia. 45__ it over, and I decided to go on. 锟斤拷 If 46__ people can go along this road, why can锟斤拷t I ? 锟斤拷 I 47__ myself. The short cut, to my surprise, was not that 48__ . In fact, it was only a very peaceful country road, 49__ up and down two low 50__ . There was 51__ traffic. On both sides of the road, you could see trees, wild flowers, and 52__ with cows and horses. My fear was 53__ with the wind. Listening to the beautiful country music over my car stereo (锟斤拷锟斤拷锟斤拷), I drove on and 54__
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