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

Đặc điểm nào sau đây là đúng khi nói về xinap?
A.Các xináp không có các chất trung gian hóa học.
B.Mỗi xináp có thể có nhiều loại chất trung gian hóa học.
C.Mỗi xináp chỉ có một loại chất trung gian hóa học.
D.Chỉ có một loại chất trung gian hóa học trong tất cả các loại xináp.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The most common _________ sources of energy are the wind and the sun.
A.non-renewable
B.fossil
C.renewable
D.liveable

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Pollution and heavy traffic are common problems in _________ cities.
A.rural
B.remote
C.overcrowded
D.quiet

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Researchers are developing low-cost devices that can _________ water pollutants in rivers and lakes.
A.enhance
B.detect
C.carry
D.warning

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My father is very optimistic about the future of our city. He believes the government will use _________ to solve the pollution problems successfully.
A.advanced technology
B.facility
C.environment
D.infrastructure

Tam giác cân có bao nhiêu tâm đối xứng?
A.3
B.0
C.2
D.1

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Farmers should use _________ methods to produce clean and healthy food.
A.rural
B.sustainable
C.urban
D.renewable

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I think the use of fossil fuels _________ pollution.
A.suggests
B.leads
C.causes
D.results