5. (A). My friend’s dissertation topic is not the best.

　　(B). My friend was chosen to present this dissertation.

　　(C). I chose a dissertation topic on the basis of my friend’s advice.

　　(D). I’m assisting my friend with his dissertation.

　　6. (A). The artist painted with his right hand.

　　(B). The artist only covered part of the canvas.

　　(C). The artist began painting in the corner.

　　(D). The artist wrote his name at the bottom of hid work.

　　答案：

　　C D

　　音频文本:

　　5. My best friend helped me choose a dissertation topic.

　　6. In the lower right hand corner of the painting is the artist’s signature.