Hai chất $ S{{O}_{3}} $ và $ Mn{{O}_{2}} $ có tên gọi lần lượt là
A.Lưu huỳnh trioxit và mangan (IV) oxit.
B.Lưu huỳnh đioxit và  mangan đioxit.
C.Lưu huỳnh tetraoxit và mangan (II) oxit.
D.Lưu huỳnh (III) oxit và mangan đioxit.

Choose the word or phrase A, B, C or D that best completes the sentence or substitutes for the underlined word or phrase.
_____ volleyball players, footballers cannot use their hands in the game.
A.Like
B.Opposite
C.Different
D.Unlike

Choose the answer among A, B, C, D to complete each of the sentences below:
People can become very___when they are stuck in traffic for a long time.
A.nervous
B.stressful
C.bad-tempered
D.pressed

Choose the answer among A, B, C, D to complete each of the sentences below:
Today, some students tend to ____ the importance of soft skills as they solely focus on academic subjects at school.
 
A.emphasize
B.overlook
C.implement
D.urge

Choose the answer among A, B, C, D to complete each of the sentences below:
Many _______ men remarry and have second families.
A.divorced
B.family
C.single
D.married

Choose the letter A, B, C or D to indicate the best answer to the following question.
The stomach of a cow, ______ that of other ruminants, is divided into four compartments.
A.same
B.similar
C.likely
D.like

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
A lot of different conservation efforts have been made to _______ endangered species.
A.do
B.save
C.kills
D.make

Choose the answer among A, B, C, D to complete each of the sentences below:
One third of the world's population _______ two thirds of the world's resources.
A.consumes
B.supports
C.absorbs
D.drains

Choose the answer among A, B, C, D to complete each of the sentences below:
He is an expert _______ economics.
A.with
B.at
C.of
D.in

Oxit bắt buộc phải có nguyên tố
A.lưu huỳnh.
B.hiđro.
C.halogen.
D.oxi.