问题补充：
Not only strict with us, but also for us.
A. was the teacher; did he care
B. was the teacher; he cared
C. the teacher was; did he care
D. the teacher was; he cared
答案：
A. was the teacher; did he care
(答案→)B. was the teacher; he cared
C. the teacher was; did he care
D. the teacher was; he cared
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