Câu hỏi: Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.

A. record

B. shine

C. categorize

D. diversify

Câu 1: When we went to the airport to see her off, we had a traffic jam.

A. say good bye to her

B. meet her

C. take care of her

D. look for her

Câu 2: Did anyone acknowledge responsibility for the outbreak of the fire?

A. inquire about

B. accept

C. report

D. find out

Câu 3: The use of lasers in surgery has become relatively commonplace in recent years.

A. comparatively

B. relevantly

C. absolutely

D. almost

Câu 4: Professor Berg was very interested in the diversity of cultures all over the world.

A. variety

B. changes

C. conservation

D. number

Câu 5: In times of war, the Red Cross is dedicated to reducing the sufferings of wounded soldiers, civilians, and prisoners of war.

A. initiated

B. appalled

C. devoted

D. mounted

Câu 6: The first few days at university can be very daunting, but with determination and positive attitude, freshmen will soon fit in with the new environment.

A. interesting

B. memorable

C. serious

D. depressing