问题是把两个句子复合成一个。用ｗｈｏ，ｔｈａｔ和ｗｈｉｃｈ连接
１．The people were in changer.The soldiers have saved them.
２．A dictionary is a book. You can use it to learn more words.
３．What was the name of the farmer?He discovered the tomb of Qinshihuang.
４．The bus goes to the airport.It runs every half hour.
１．The soldiers have saved the people who were in changer.
２．A dictionary is a book that (which) you can use to learn more words.
３．What was the name of the farmer who discovered the tomb of Qinshihuang?
４．The bus which runs every half hour goes to the airport.
1. The people that the soldiers have saved were in changer.
2. A dictionary is a book witch(that) you can use to learn more words.
3. What was the name of the farmer who discovered the tomb of Qinshihuang?
4. The bus that(which) runs every half hour goes to the airport.