【正文】
I have been to the Great Wall once. (He tells me…) 2. 探究學(xué)習(xí) Step 1 Revision Check the exercises about modal verbs in the workbook. Step 2 Leadin Ask the students two questions about the life on Mars. What do many people think of the life by the year 2100? Who will do most of the work on Mars? Step 3 Presentation 1 (1) According to the students’ answers, show them the sentences with object clauses. People think (that) robots will do most of our work. Many people believe (that) we will live on the pla Mars by the year 2100. Many people are sure (that) they will have more