纠错 The teacher repeated the assignment again for the students, since they had difficulty understanding what to do after he had explained it the first time.
举一反三
- The teacher wanted his students to do a ________ on local traditions and how they had changed over time.
- The teacher had three students in this English speech contest, and all of which won the first prize. A: had B: in C: of which D: first prize
- What ______ Jim ________ by the time he was seven？ A: did, do B: had, done C: have, done
- If he had time, he would go with us.=But in fact he has no time.
- 中国大学MOOC: When he explained it again and again, the students patience ______.