Unit 2 Great peoplePeriod 3 Grammar必背单词必背单词1.passage n.章节，乐段 必背短语必背短语2._ 从事，忙于3._相继地4._参加5._前天6._ 的发明7._手工work on one after another take part in the day before yesterdaythe invention of by hand 必背句子必背句子&语法语法8.School _ over and the students _ home.放学了，学生们回家了。9.Mum _ the housework and Dad _ on the computer.妈妈正在做家务，爸爸正在电脑上工作。10.She _ the USA twice.她去过美国两次。11.In the past,people _ their clothes _.在过去，人们用手洗衣服。is go is doing is workinghas been to washed by hand