日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

It was only several days ______ he realized the truth that he had been affected with AIDS．

A．until         B．since        C．before          D．as

It was only several days ______ he realized the truth that he had been affected with AIDS.

      A．before                B．since                   C．until                   D．as