Câu hỏi: Many scientists agree that global warming poses great threats to all species on Earth.

A. irritations

B. annoyances

C. fears

D. risks

Câu 1: Nobody knows the origin of the Vietnamese long dress. There was no evidence about where and when it appeared.

A. evaluation

B. book

C. proof

D. symptom

Câu 2: The yearly growth of the gross national product is often used as an indicator of a nation's economy.

A. annual

B. irrefutable

C. tentative

D. routine

Câu 3: It is an occasion when strength and sports are tested, friendship and solidarity was built and deepened.

A. practice

B. power

C. will

D. competence

Câu 4: Those companies were closed due to some seriously financial problems.

A. taken off

B. put away

C. gone over

D. wiped out

Câu 5: As tourism is more developed, people worry about the damage to the flora and fauna of the island.

A. fruits and vegetables

B. flowers and trees

C. plants and animals

D. mountains and forest

Câu 6: He made one last futile effort to convince her and left home.

A. favorable

B. difficult

C. ineffectual

D. firm