Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
_________ will continue to be a big threat to life on Earth.
A.Global warming
B.Solar energy
C.Environment
D.Renewable energy

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If unemployment is rising, people _________ to stay in their current jobs.
A.take
B.tend
C.would
D.should

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The country’s _________ is in poor condition and needs to be upgraded.
A.inhabitant
B.sustainable
C.urbanization
D.infrastructure

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Songdo International Business District was started from _________ in 2005 and is still being built for the future.
A.air
B.water
C.paper
D.scratch

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If we have solar _________ on our roofs, we’ll be able to generate our own electricity.
A.panels
B.tables
C.boxes
D.stairs

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The main goal of _________ planning is providing a healthier environment for people living in the city.
A.urban
B.village
C.rural
D.suburban

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I hate travelling during the rush hour. The trains and buses are all _________.
A.overcrowded
B.optimistic
C.detected
D.advanced

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The government needs to solve the pollution problems to make the city _________.
A.overcrowded
B.harmful
C.polluted
D.liveable

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Thanks to various _________ installed in every home and public place, the company can predict probable disasters, identify their locations and send a rescue team to help the people in danger.
A.papers
B.documents
C.warnings
D.sensors

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The main function of his company is to deal with urban _________ problems to make the city greener, cleaner and more livable.
A.social
B.environmental
C.political
D.cultural