The boy made the same mistakes ________,  which, of course, made his parents very angry.[      ]

A. over and over again  

B. more or less

C. sooner or later  

D. here and there

卷材防水屋面铺贴卷材应采用搭接法。平行于屋脊的搭接缝，应顺______方向搭接；垂直于屋脊的搭接缝，应顺年最大频率风向搭接。

A．顺坡

B．逆坡

C．流水

D．逆水