The boss the worker how to do it ,or the accident couldn't h

The boss (A) the worker how to operate the machine,or the ac It couldn't spread to the north because of a lake or to the she has tried many times.the boss told her how to do it(合并） （ ） the car accident,Jack couldn t work any longer. 请问英语句型语法if a worker knows the boss will check up on how well The man couldn't read or write and had to give up the job. The boss made the~(worker)work ten hours a day . It wasn't a bad accident.The damage to the car wasn't seriou The key to the bike ______, he couldn't ride it to school to I can't help ___ the job.because Idon't know how to do it. it you or I who _ to be responsible for the accident? A.Is;a I know…learn to give up or sharing .But the later I couldn't