Câu hỏi: We watched as the plane disappeared behind the clouds.

A. melted

B. escaped

C. vanished 

D. perished

Câu 1: Now I understand why you moved out of that house.

A. I am surprised

B. it frustrates me

C. I am intrigued

D. it makes sense to me

Câu 2: Before the earthquake hit the area,many minor tremors were felt.

A. spasms

B. noises

C. vibrations

D. crumblings

Câu 3: The 1908 Siberian meteorite explosion brought about considerable depletion of the northern hemisphere's ozone layer.

A. was caused by

B. resulted in

C. brought back

D. was initiated by

Câu 4: In most countries, compulsory military service does not apply to women.

A. superior

B. mandatory

C. beneficial

D. constructive

Câu 5: He was fired because of his misconduct at the office party.

A. mistake

B. impropriety

C. condition

D. singing

Câu 6: The sales of drugs is controlled by law in most of countries.

A. permitted

B. restricted

C. illegal

D. binding