Câu hỏi: UFOs mean ................flying objects.

A. unknown

B. unidentified

C. unable

D. unimaginary

Câu 1: The existence of different kinds of animals and plants which make a balanced environment is called........

A. biodiversity

B. rubbish

C. challenge

D. maintain

Câu 2: Yesterday a hurricane hit the................of Vung Tau City.

A. coaster

B. coast

C. coasting

D. coastal

Câu 3: A country which exports a lot of rice is called a(n)........country.

A. rice-export 

B. exporting-rice

C. export-rice

D. rice-exporting

Câu 4: I can't hear what you are saying. Can you................the radio?

A. turn on

B. turn off

C. turn up

Câu 5: Chaplin's movies captivated.........throughout the world.

A. scientists

B. musicians

C. directors

D. audiences

Câu 6: Van Mieu was a place to........the most brilliant scholars of the nation.

A. remember

B. memorialize

C. certify

D. impress