导游服务的性质包括（）。
A.文化性
B.服务性
C.经济性
D.艰苦性
E.涉外性
参考答案：A, B, C, E
I suggest that that we should take part in more such activities in future we did yesterday.
A．which
B．as
C．that
D．than
道教为何提倡不争？
