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

A. Ø

B. an

C. the

D. a

Câu 1: Air pollution, together with littering, are causing many problems in our large, industrial cities today.

A. are

B. industrial

C. problems

D. with

Câu 2: I and Kenny______ pen pal friends since I_______ Singapore.

A. are/ visit

B. were/ have visited

C. were/ visited

D. have been/ visited

Câu 3: Mark hopes _______ a small part in the school play.

A. to get

B. getting

C. get

D. got

Câu 4: The first color TV _____________ in 1928.

A. produce

B. is produced

C. was produced

D. produced

Câu 5: We _________ already ________ Huong Pagoda.

A. were…seeing

B. have…seen

C. are…seeing

D. will…see

Câu 6: The view is great, _______?

A. isn't it

B. was it

C. doesn't it

D. did it