【正文】
案 三.定語從句專練習 : 用恰當?shù)年P系詞填空。t _________ not to know me, actually you know me very well. 8. We couldn39。t know how 2. to plant crops or how to keep animals for their 3. food. We call them Stone Age people. Thing for 4. them were terrible and hard. Now there have still 5. some people living liked those Stone Age people. 6. They live in places that are hard reach. They do not 7. know of our invention, for they keep themselves