Câu hỏi: Human beings are ________ greatest threat to survival of endangered species.

A. Ø

B. an

C. the

D. a

Câu 1: _________, we couldn’t make out the gist of the passage.

A. Due to Romeo’s carefully explanations

B. Though carefully explained by Romeo

C. Carefully as Romeo explained

D. As Romeo carefully explained

Câu 2: In an essay writing in 1779, Judith Sargeant Murray promoted the cause of women's education.

A. the cause of

B. writing

C. In an essay

D. women's education

Câu 3: Before becoming successful, Charles Kettering, former vice president of General Motors, was so poor that he has to use the hayloft of a barn as a laboratory.

A. as

B. so poor

C. has to

D. successful

Câu 4: Josh would never forget ________ by his parent through no fault of his own.

A. having scold

B. to have scolded

C. to be scolded

D.  being scolded

Câu 5: I and Kenny______ pen pal friends since I_______ Singapore.

A. are/ visit

B. were/ have visited

C. were/ visited

D. have been/ visited

Câu 6: If ________ access to education, children living in poverty will have a brighter future.

A. providing

B. are provided

C. having provided

D. provided