中国大学MOOC: In the USA in 1967, a man reported ________ UFO (unidentified flying object).
举一反三
- In the USA in 1967, a man reported ________ UFO (unidentified flying object). A: X B: a C: an D: the
- What is an UFO? A: It is an Unknown Flying Object. B: It is an Unidentified Flying Object. C: It is an Unknown Flowing Object. D: It is an Unidentified Flowing Object.
- People use the word "unidentified" to describe the reported flying objects .because what these objects are is still unknown.
- 中国大学MOOC: A strange flying object is seemingly in the backyard.
- 中国大学MOOC: State governments in the USA are __________ .