Unit 2 Great peoplePeriod 3 Grammar必背单词 1.passage n.章节，段落必背短语 2._参加3._的发明4._用手take part inthe invention ofby hand必背句子&语法 5.School is _ and the students go home.放学了，学生们回家了。6.Mum _ _ the housework and Dad _ _ on the computer.妈妈正在做家务，爸爸正在电脑上工作。over is doing is working 必背句子&语法 7.She _ _ _ the USA twice.她去过美国两次。8.In the past,people washed their clothes _ _.在过去，人们用手洗衣服。has been to byhand
