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

The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.

   A. held on    B. worked out    C. touched on    D. kept out of

The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.

   A. held on    B. worked out    C. touched on    D. kept out of

The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.

　　A. held on    B. worked out    C. touched on    D. kept out of

The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.

　　A. held on    B. worked out    C. touched on    D. kept out of

The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.