cannto start task

cannto start task Cannot,start.task是什么意思 error cannot start task!与error cannot createt ask! task DNF更新出现Cannot start task!跟 Cannot create task!我已经下了4遍客户端了, start start , start start start start start 这个由被动变主动 正确吗All the preparations for the task have been completed and we aer ready to startWe have completed all the preparations for the task and we aer ready to start All the preparations for the task _____,and we're ready to start.A.completed B.complete C.had been completed D.have been completed All the preparations for the task ________ and we’re ready.to start.A.completed B.complete C.had been completed D.have been completed task是什么意思 task是什么意思 task centred