用括号内所给单词的适当形式填空。

1. "Thank you for teaching us so well," the students say to their English _____. (teach)

2. —What's the meaning of "expensive"?

    —It _____ "dear".(mean)

3. Mr. Green often _____ his given name to others. (give)

4. Tom likes _____ football. We have fun to play it with him after school. (play)

5. They ask me _____ the watch for them. (get)

6. We are going to give our English teacher a present for _____ (teacher) Day.

7. My bike is different from _____ (he).

8. Her mother is a teacher. She _____ (teach) in our school.

9. I want to have some _____ (piece) of colour paper.

10. Mr. Wang wants me _____ (talk) about America.

口腔预防教研室集体备课时，李老师提到口腔预防医学开始发展的时间是

A．18世纪末
B．20世纪中期
C．19世纪初
D．19世纪末
E．20世纪初