题目内容：
根据短文内容，回答题。Nowadays most people decide quite early what kind of work they would do．When I was at school．We had to choose _____51_____ when we were fifteen．I chose scientific subjects．“_____52_____，scientists will earn a lot of money，”my parents said．For three years I tried to learn physics and chemistry．but in the _____53_____ I decided that l would never be a scientist．It was a long time _____54_____
I told my parents that I wasn’t happy at school．“I didn’t think you were．”said my mother．“I didn’t either，”said my father．“Well，the best thing to do now is to look for a job．”
I talked about it with my friends Frank and Lesley．_____55_____ of them could suggest anything，but they promised that they would ask their friends．A few days later_____56_____I was still in bed，someone telephoned．“Is that Miss Jenkins?”A voice asked．“I understand your hobby is photography and I’ve got a job that might interest you in my clothes factory．My name is Mr. Thomson．” He seemed pleasant on the phone _____57_____ I went to see him．1 was so excited that I almost forgot _____58_____ goodbye．“Good luck!” my mother said to me．
I arrived a bit early and when Mr．Thomson came he asked me if I _____59_____ waiting a long time．
“No not long．”I replied．After talking to me for about twenty minutes he offered me a job not as a photographer though，_____60_____ a model!
_________ A．what should study
B．what be studied
C．what to study
D．what studied
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