Trắc nghiệm Unit 10 Tiếng Anh lớp 9 phần Read - Li...

A. observe

B. explain

C. calculate

D. require

A. spacecraft

B. astronaut

C. flying saucer

D. cooking oil

A. 10%-20%

B. 20%-30%

C. 30%-50%

D. 80%-90%

A. stars

B. balloons

C. clouds

D. rains

A. UFO means Unidentified Flying Object.

B. UFO is often used to talk about alien spaceships.

C. Many UFO sightings are hoaxes.

D. Over half of all reported UFO sightings are identified.