（），词的格律定型。
A.中唐
B.晚唐
C.元代
D.汉代
参考答案：B
So difficult _____ it to live in an English-speaking country that I determined to learn English well. [ ]
A. I did feel
B. did I feel
C. I have felt
D. have I felt
循行于腹面的经脉有（）
A.足阳明经
B.足少阴经
C.足太阴经
D.任脉
E.足厥阴经
