I don’t think Peter is too young to take care of the pet dog ________.
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.