_____ in charge of two classes made Mrs. Li, head of Senior Grade 3, extremely tired.
32. It’s important to listen to your teacher carefully in class, so try not to let your mind _________.
31. -Do you mind if I turn off the TV? -__________.
30. Jennifer, who is my best friend, said she would go abroad for further education __________.
29. A good teacher should leave some time for the students to _________ the knowledge.
28. There is no doubt that a small child has to learn to keep its _________ before it can walk far.