根据上下文意思或首字母提示，写出合适的单词。

1. Usually students don't have the lesson in the classroom with their teacher. They often run, and play

    ball games in the playground. This is a           lesson.

2. Usually students don't speak Chinese in this subject. They often say “ABC…” and do some reading

    and copying. This is an____    lesson.

3. They are s            days in a week.             is the last (最后的) day of a week.

4. Yang Ling likes s_____ and d            very much, so she likes music lessons.

Professor Fish made the remark __________ it doesn’t make much of a difference to one’s

 personality __________ he studies arts or sciences at college. [      ]

A. that; that

B. in which; whether      

C. which; that    

D. that; whether