Câu hỏi: Air pollution, together with littering, are causing many problems in our large, industrial cities today.

A. are

B. industrial

C. problems

D. with

Câu 1: Human beings are ________ greatest threat to survival of endangered species.

A. Ø

B. an

C. the

D. a

Câu 2: Mike came across his old friend - Maria while he _______ along the street.

A. had walked

B. would walk

C. was walking

D. walked

Câu 3: If I _______ just one year younger, I would be eligible for the scholarship.

A. am

B. will be

C. would be

D. were

Câu 4: I was really impressed ………………….the beauty of Dubai.

A. on

B. in

C. to

D. by

Câu 5: He is very keen______ English, but he is not good ______ listening.

A. on/ at

B. on/ in

C. at/ on

D. at/ at

Câu 6: The first color TV _____________ in 1928.

A. produce

B. is produced

C. was produced

D. produced