【简答题】Complete each sentence with the correct form of a word from exercise A. Then listen and check your answers. 1. Ancient people didn't have metal. They used __________ tools for farming and hunting. 2. ...
【简答题】Fill in each of the blanks with an appropriate word or phrase from each group. change the form if necessary. black and white in black and white A. Part of the problem is that we only see the iss...