(),we must do work on the machine.A for a machine to do work

(),we must do work on the machine.A for a machine to do work ( ),we must do wok on the machine A.For a machine to do wok _______,we must do work on the machine.填哪个 为什么. The machine can do the work for _____(quick) -The machine is too old to work -we need to buy a new one th We must find a person ___ (do) the work. 翻译：　The machine can do the work of three people ---With the help of that machine.we can do the work with ___ 44.----- Do you see why the machine doesn't work? Do you see why the machine doesn,t work? This machine needs______once a year in order to work properl We try to do the work,but it doesn't____(A.do B.did C.work)