19. (A). He’s absent again! (B). Isn’t he forgetful!

　　(C). How often is he absent? (D). How forgetful is he ?

　　20. (A). High prices annoy me . (B). The trail went up very steeply.

　　(C). I stay away from heights. (D). I enjoy exciting places.

　　答案：

　　B C

　　音频文本:

　　19. How absent minded he is!

　　20. I try to avoid high places.