Ⅰ. 单项选择(30分)
1. We must be strict _______ ourselves and strict _______ our work.
A. in; with B. with; in
C. in; in D. with; with
2. They learned it all by themselves. That is to say, nobody told them _______.
A. what to do it B. how to do it
C. where to do D. when to do
