问题描述：
连词用法举例...which one is correct,please?________ modeling business is by no means easy to ge
Which one is correct,why,please?有2种答案,A,B,请翻译你选择的答案.
________ modeling business is by no means easy to get into,the good model will always be in demand.
A.While B.Since C.As D.If
Which one is correct,why,please?有2种答案,A,B,请翻译你选择的答案.
________ modeling business is by no means easy to get into,the good model will always be in demand.
A.While B.Since C.As D.If
问题解答：
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