— How do you find the club?   

— I ______ it. Everyone is saying its management is going from bad to worse.[ ]

A. couldn't have joined              

B. might have joined

C. would rather not have joined    

D. would like to have joined

上层建筑的长度S是指位于船长L内的上层建筑的（）长度。

A、最大

B、最小

C、平均

D、有效