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: I received housing benefit when I was unemployed.

A. out of order

B. out of fashion

C. out of work

D. out of practice

Câu 2: This quartet of extraodinarily talented musicians generated a phenomenal number of pieces that won gold records.

A. irresponsible

B. incompetent

C. stupid

D. crazy

Câu 3: An international medical conference initiated by Davison resulted in the birth of the League of Red Cross Societies in 1991.

A. treated

B. dedicated

C. helped

D. started

Câu 4: In my experience, freshmen today are different from those I knew 25 years ago.

A. first-year students

B. new students

C. new counselors

D. young professors

Câu 5: Professor Berg was very interested in the diversity of cultures all over the world.

A. variety

B. changes

C. conservation

D. number

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