unit 20 new frontiers 一、语法专项训练根据括号内的提示完成句子。 1.at this time tomorrow, the secretary __________________ (finish) the work. 2.by the end of this year, i ________ (read) 3 english novels. 3.________ you________ (leave) when i come back? 4.i hope he________(arrive) before my friends go back. 5.by next november, i __________________(receive) my promotion.