As a salesman, he works on a (an) ______ basis, taking 10% of everything he sells.

单项选择题I'm not quite sure how to get there. I'd better______a map.

单项选择题—I'm going to study engineering in Tsinghua University tomorrow. —______.

单项选择题______被认为是教育心理学的创始人。

单项选择题—You haven't been to Beijing, have you — ______. And how I wish to go there again!

单项选择题According to the United States Constitution, the legislative power is invested in ______.

单项选择题“道之所存，师之所存也”，这体现了教师的( )。

单项选择题（）是英语课程的出发点和归宿。

A．知识的传授
B．学生的发展
C．语言的运用
D．习惯的养成

单项选择题You () the project by now.

A. are supposed to finish
B. supposed to finish
C. are supposed finishing
D. are supposed to have finished

单项选择题社会本位教育目的论的代表人物是( )。