Câu hỏi: We are very grateful to Professor Humble for his generosity in donating this wonderful painting to the museum.

A. meanness

B. sympathy

C. gratitude

D. churlishness

Câu 1: He is over the moon about his good marks.

A. satisfied

B. very happy

C. stressed

D. disappointed

Câu 2: Maureen usually felt depressed on Mondays, because she never got enough sleep on the weekends.

A. unhappy

B. affluent

C. glum

D. understanding

Câu 3: Slavery was abolished in the US in the 19th century.

A. instituted

B. eradicated 

C. eliminated

D. required

Câu 4: Names of people in the book were changed to preserve anonymity.

A. reveal

B. conserve

C. cover

D. presume

Câu 5: Doctors have been criticized for their indiscriminate use of antibiotics.

A. disciplined

B. selective

C. wholesale

D. unconscious

Câu 6: Synthetic products are made from chemicals or artificial substances.

A. natural

B. made by machine

C. man-made 

D. unusual