【题目】It took me quite a long time to develop a voice, and _______ I have it, I am not going to be silent.
A. now that B. unless
C. so that D. although
在线课程【答案】A
【解析】本题考查连词。 根据句意：学会发声花了我很长时间。既然我现在掌握了，我就不准备沉默下去。Now that既然；unless除非；so that结果；although尽管，根据句意，可知答案A符合语境。