_______ that he was in great danger, Eric walked deeper into the forest.
| A．Not realized | B．Not to realize | C．Not realizing | D．Not to have realized |
33. The medicine works more effectively _______ you drink some hot water after taking it.
| A．as | B．until | C．although | D．If |
32. --- Bob, you are absent-minded!
--- Oh, I’m sorry I _______ attention to you, Miss Shute.
| A．haven’t paid | B．wasn’t paying | C．am not paying | D．couldn’t have paid |
31. There was a teapot shaped like a duck, out of ____open mouth the tea was supposed to come.
| A．which | B．its | C．that | D．Whose |
30. --- Mrs. Smith, please teach me how to draw on the computer today.
--- Oh, no._______. You have to get familiar with the keyboard first.
| A．It is never too old to learn | B．Think twice before you do |
| C．Learn to walk before you run | D．One today is worth two tomorrows |
29. He told us that the girl was _______, so we went to save her.
| A．dangerous | B．in danger | C．a danger | D．Endangering |