41.My uncle used to work as an__________(assist) for Mr.Clin

41.My uncle used to work as an__________(assist) for Mr.Clinton．
42.Liu Hulan died a glorious__________(die) at the age ofeighteen．
43.As Grade Nine students,we should still take part in all kinds of_____ (act)．
44.The scientist ________ (introduction) himself before he began his lecture．
45.Nowadays,various_________(electricity) appliances have come into our families