问题补充：
Not only interested in changing teaching methods but beginning to show an interest in it.
A. the teacher himself is; all his students are
B. the teacher himself is; are all his students
C. is the teacher himself; are all his students
D. is the teacher himself; all his students are
答案：
A. the teacher himself is; all his students are
B. the teacher himself is; are all his students
C. is the teacher himself; are all his students
(答案→)D. is the teacher himself; all his students are
解析： 考查倒装句，not only,but also,不仅，而且，not only 放在句首使用部分倒装，but also后面的句子不倒装，所以选D。
