题目

22.中国古代发明的某种工具，利用河水的冲力转动机械轮轴，使鼓风皮囊张缩，不断给高炉加氧，“用力少，见功多”。这项发明 A．是古代冶铜技术的一大进步                  B．导致唐代筒车的出现 C．推动了当时冶铁技术的发展                  D．促进了灌钢法的发展 答案：CAfter eating,you need to b_______ your teeth.1.We usually go to bed at nine thirty,so we have a very h______ life.2.Liangliang loves to play with his c______after class,they’re like his brothers and sisters to him.3.I hope their dreams can come t______.4.Ice -cream usually t______ good,so students like to eat it after school.