Câu hỏi: People are busy buying gifts, cleaning and decorating the house and cooking traditional foods to welcome Tet holiday now.

A. favorite

B. important

C. customary

D. national

Câu 1: He was asked to account for his presence at the scene of crime.

A. complain

B. exchange

C. explain

D. arrange

Câu 2: You never really know where you are with her as she just blows hot and cold.

A. keeps going

B. keeps taking things

C. keeps changing her mood

D. keeps testing

Câu 3: 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 4: Most ethnic groups in Vetnam have their own costumes that reflect their unique culture identities.

A. invaluable

B. different

C. distinctive

D. important

Câu 5: How many countries took part in the last Olympic Games?

A. participated

B. performed

C. succeeded

D. hosted

Câu 6: Fallout from a nuclear power station damaged in the tsunami may endanger the vegetation.

A. stimulate

B. harm

C. inhibit

D. benefit