15. (A). She stooped to look at the class.

　　(B). She knew where to seat the man.

　　(C). She wanted to show them the procedure again.

　　(D). She stopped reviewing the experiment.

　　16. (A). The program will last a quarter of an hour.

　　(B). The program will start in fifteen minutes.

　　(C). A quarter of the program takes an hour.

　　(D). One-fourth of the program is finished.

　　答案：

　　C B

　　音频文本:

　　15. She stopped the class experiment to review the procedure.

　　16. The program will be on in a quarter of an hour.