墙身砌筑高度超过1.2米时应搭设脚手架，同一块脚手板上的操作人员不得超过（）人。

A.一

B.二

C.三

D.四

—What would you like to do in the future?            

—I'd love to sail________the Pacific some day.       [ ]

A. across    

B. through    

C. down      

D. along