语法与词汇 20.The old musician decided to move to her country home______her advanced age and poor health.
【正确答案】 C
【答案解析】四个选项的意思分别是:with regard to关于;by virtue of依靠,由于;on account of由于,因为;on/to the verge of接近,濒临。根据句意,应该选择C。