After a knock at the door, the child heard his mother’s voice ______ him.
39. Is this the reason ____ at the meeting for his carelessness in his work?
37. These wild flowers are so special that I would do___________I can to save them .
32. Look at the trouble I am in! If only I ____your advice. 33.
30. A person’s _____ body temperature is about 37℃. 31.
29. Great changes _____ in the city, and a lot of factories _____.