线路维修工作必须掌握线路设备技术状态变化规律，贯彻“（）、防治结合、修养并重“的原则。
A、整治为主
B、预防为主
C、检查为主
D、巡视为主
参考答案：B
If you plant watermelon seeds in the spring，you ________ fresh watermelon in the fall.(2010·浙江)
A．eat
B．would eat
C．have eaten
D．will be eating
If better use is _____ of your sparetime, you'll make great progress in it. [ ]
A. spent
B. made
C. taken
D. thought
