181，100，73，64，( )
A．56
B．60
C．59
D．61
参考答案：D
—I don't think I'll be able to go mountainclimbing tomorrow.
—________?[ ]
A. And how
B. How come
C. How's it going
D. How about it
如图所示的标志牌表达的含义是______，______．
be able to go mountainclimbing tomorrow.