Working can be educational ,but it can also be h_____ .(填什么)

Working can be educational ,but it can also be h_____ .(填什么) the light is out. they can not be working now.为什么用be working 呢?是虚拟语气嘛? Can you briefly tell me about the people I will be working with most closely? 这句话怎么翻译?Working with the mentally handicapped can be a satisfying and rewarding experience. I can't see any benefit their _____ in such way.A.to be working B.worked C.working D.being worked这句话意思? messages can be sent using a thoughtpad1 Messages can be sent using a thoughtpad.2 No more typists working on a typewriter or computer详细解释一下为什么用using,working Good reading habits like these can help students and working adults alike to be more successful.alike是形容词啊, 语法题You've been working for more than 4 hours.You （ ）hungry A can be B must be C should be 英语翻译for the machine testing :- must can working on column wood ,- must can working on flat wood- must can working bent shape wood- machine must can work on wood piece size up to 1200 x 250 mm.- power motor must be 3 phase- power motor must be You______ be tired--you've only been working for an hour.用can't还是may not?答案是can't但是may not为什么不可以? 英语翻译It can be used in greenhouses,barns and any other working environments that needs temperature to be measured and controlled.这句话有没有什么错误呀? 请问She is a hard-working player and I'm sure that she can be successful to the oympics.能否列举be scuccessful to的用法 used to working是什么意思?used to be working Today working?Can I call u later? can be They are busy _ this week.They _ very tired.Why not _ a rest?A.work,may be,to have B.to work,can be,have C.working,nust be,haveD.with work,will be,having we are happy to be working是什么意思 You ( )be tired .you have only been working for an hour.A.must B.wont C.cant D.may not