Câu hỏi: Some of the participating schools have also decided to use green cleaning products, which are safer since they do not ……. harmful chemicals into the environment.

A. release

B. expose

C. compound

D. deplete

Câu 1: A ___________ buffalo is the 22nd South East Asian Games Mascot because Vietnam is an agricultural country.

A. bronze

B. golden

C. silver

D. yellowish

Câu 2: With the strong support of their countrymen, the Vietnamese athletes competed in ___________ spirits.

A. big

B. strong

C. high

D. lot

Câu 3: He is one of the most ………. bosses I have ever worked with. He behaves rudely to not only me but also others in the staff.

A. thoughtful

B. impolite

C. attentive

D. communicative

Câu 4: Many plants and animal species are now on the _______ of extinction.

A. danger

B. border

C. margin

D. verge

Câu 5: The construction work was carried out by the local contractor.

A. continued

B. completed

C. done

D. run

Câu 6: Do you know how many countries __________ part in the sporting event?

A. take

B. make

C. have

D. do