I am sure ____ he did is wise.
32. --- Bob, you are absent-minded!--- Oh, I’m sorry I _______ attention to you, Miss Shute.
31. There was a teapot shaped like a duck, out of ____open mouth the tea was supposed to come.
30. --- Mrs. Smith, please teach me how to draw on the computer today. --- Oh, no._______. You have to get familiar with the keyboard first.
29. He told us that the girl was _______, so we went to save her.
28. Vitamin D helps our bodies make a special chemical, and this special chemical, _______, affects our brains, making us feel happy.