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: About 95% of all animals are invertebrates which can live anywhere, but most, like the dtarfish and crab, live in the ocean.

A. with backbones

B. with ribs

C. without ribs

D. without backbones

Câu 2: No one knew precisely what would happen to a human being in space

A. casually

B. flexibly

C. wrongly

D. informally

Câu 3: He had never experienced such discourtesy towards the president as it occurred at the annual meeting in May.

A. politeness

B. rudeness

C. measurement

D. encouragement

Câu 4: Synthetic products are made from chemicals or artificial substances.

A. natural

B. made by machine

C. man-made 

D. unusual

Câu 5: Paid employment has doubtedly brought economic and social gains to many women.

A. independently

B. hardly

C. freely

D. certainly

Câu 6: Nutritionists believe that vitamins circumvent diseases.

A. defeat

B. nourish

C. help

D. treat