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:

The shop assistant was totally bewildered by the customer’s behavior.

A. disgusted

B. puzzled

C. angry

D. upset

Câu 2:

Students are expected to always adhere to school regulations.

A. question

B. violate

C. disregard

D. comply

Câu 3:

Though many scientific breakthroughs have resulted from mishaps it has taken brilliant thinkers to recognize their potential.

A. accidents

B. misunderstandings

C. incidentals

D. misfortunes

Câu 4:

The US troops are using much more sophisticated weapons in the Far East.

A. expensive

B. B: simple and easy to use

C. C: complicated

D. difficult to operate

Câu 5:

His new yacht is certainly an ostentatious display of his wealth.

A. showy

B. expensive

C. large

D. ossified

Câu 6:

I cannot understand why she did that, it really doesn’t add up.

A. doesn’t calculate

B. isn’t mathematics

C. C. doesn’t make sense

D. D. makes the wrong addition