Usually a child's behavior is a ________ of his family environment.
In Jan., 2010, Xin Jiang was struck by so terrible a snow______few people had ever experienced before.
The failure to find a satisfactory job after graduation pushed him to____writing as a career.
---Poor John! I could hardly recognize him just now! ---_______. He has changed so much.
---You keep on coughing. What’s the matter?---Oh, I’ve got a cold. Nothing serious, _______.
---I’m sorry that I didn’t work out this problem. ---It’s _____our ability. I didn’t work it out, too.