We were all very much attracted by the beautiful scenery________we set foot in the village. [      ]

A. quickly  

B. suddenly

C. finally  

D. immediately

凸轮磨损后，凸缘高度降低，造成气门开度变小，使气门（）。

A.早开早闭

B.早开晚闭

C.晚开早闭

D.晚开晚闭