筷子的禁忌包括（）。
A.迷筷
B.脏筷
C.敲筷
D.指筷
E.抢筷
F.刺筷
参考答案：A, B, C, D, E, F
38. Li Ming, as well as some of his classmates, ______voluntary work now.
A．are doing
B．is doing
C．do
D．have done
中央集权制警政管理体制以英国为代表。
