Câu hỏi: 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 1: Many scientists agree that global warming poses great threats to all species on Earth.

A. irritations

B. annoyances

C. fears

D. risks

Câu 2: Ask Mum for permission to go out now. She looks like she’s in a good mood.

A. fashionable

B. unconcerned

C. healthful

D. happy

Câu 3: He made one last futile effort to convince her and left home.

A. favorable

B. difficult

C. ineffectual

D. firm

Câu 4: Don't be concerned about your mother's illness; she'll recover soon.

A. surprised at

B. worried about 

C. embarrassed at

D. angry with

Câu 5: 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 6: 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