The repair work ___ by the major.

The repair work ___ by the major A watched out B watched over C watched D watched on 我选B 对了 可是我不知道为什么 能否解释一下这四个词的区别？ 谢谢

The repair work ___ by the major. work of the world The bike needs_____(repair).填什么?并解释 改错This is the steel work where we often work It was his job to repair bicycles and at that time he used to work fourteen hours a day. The members work toards a common abjective To finish the work is not easy. i think the work easy to do 题目：With all the work _____, .............. The work is too hard, so____weer needed.