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

A. take

B. make

C. have

D. do

Câu 1: 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 2: Deserts often include _________ and rocky surface.

A. oil

B. water

C. sand

D. trees

Câu 3: Although the staff did expand somewhat for the first century of its existence, the entire teaching staff consisted of the president and three or four tutors.

A. to and from

B. more or less

C. back and forth

D. side by side

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

A. danger

B. border

C. margin

D. verge

Câu 5: When someone …………… a poem or other piece of writing, they say it aloud after they have learn it.

A. recites

B. takes part in

C. completes

D. complete

Câu 6: 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