------,but the idea of having to work more than ten hours a

______,but the idea of having to work more than ten hours a day without weekends discouraged me.
A.Wanting to be a teacher B.Although I wanted to be a teacher
C.I had wanted to be a teacher D.To want to be a teacher
这一条怎么选 这种时态讲一下怎么判断怎么用