中国大学MOOC: 26 A pilot entering Class C airspace is flying over an average-sized city.
举一反三
- 中国大学MOOC: The area of our city is larger than your city.
- 中国大学MOOC: Is there anyone in your class ______family is in the city?
- 中国大学MOOC: The city of Beijing has a long history that dates back over years.
- In 1947 a pilot saw________UFO flying in________sky.
- In 1947 a pilot saw________UFO flying in________sky. A: a; the B: an; the C: a; / D: an; /