—Shall we go out for a walk as soon as it    __    ?        

—That sounds great.       [ ]

A. stops raining    

B. raining    

C. stops to rain

油套管分采管柱是采取（）方式生产

A、套管采上段，油管采下段

B、套管分别采上、下两段

C、油管分别采上、下两段

D、套管采下段，油管采上段