15.(A). I think the tea has made me feel better.

　　(B). I’ve bought some presweetened tea.

　　(C). I find that tea without sugar is bitter.

　　(D). I’m now accustomed to tea that has no sugar in it.

　　16.(A). Martha watched the clock as she studied.

　　(B).Martha studied near the clock.

　　(C). Martha managed to find time to study.

　　(D). Martha studied all day and all night.

　　答案与音频文本：

　　D D

　　15. I’ve finally gotten used to drinking my tea without sugar.

　　16. Martha studied around the clock for her management exam.