33. E-mail, as well as telephones, ____ an important part in daily communication.
33. Is it the letter you got yesterday ________ makes you so sad?
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.