Câu hỏi: The world is becoming more industrialized and the number of animal species that have become extinct have increased.

A. industrialized

B. species

C. extinct 

D. have

Câu 1: It is recommended that people to take regular exercise.

A. recommended

B. people

C. to take

D. exercise

Câu 2: Proteins are made up of folded irregularly chains, the links of which are amino acids.

A. made up of

B. folded irregularly

C. the links

D. which

Câu 3: Could you tell me how can I get to the city library, please?

A. Could

B. me

C. how can I

D. the

Câu 4: The number of students attending universities to study economics have increased steadily in the last few years.

A. of students

B. attending

C. economics

D. have

Câu 5: The most visible remind of the close relationship between the United States and France is the famous Statue of Liberty, which stands in New York habor.

A. remind

B. between

C. is

D. which

Câu 6: The bones of the elderly are more prone to fractures than of young people.

A. the elderly 

B. more

C. to

D. of