___________ he hs limited technicl knowledge, the old w...
单项选择题___________ he hs limited technicl knowledge, the old worker hs lot of experience.SinceB.U
nl___________ he hs limited technicl knowledge, the old worker hs lot of experience.Since B.Unless C.s D.lthoughA.SinceB.UnlessC.AsD.Although