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

A. are/ visit

B. were/ have visited

C. were/ visited

D. have been/ visited

Câu 1: Jane never gives her mother a hand in housework _________ she has a lot of free time.

A. although

B. since

C. in spite of

D. because of

Câu 2: The first color TV _____________ in 1928.

A. produce

B. is produced

C. was produced

D. produced

Câu 3: Human beings are ________ greatest threat to survival of endangered species.

A. Ø

B. an

C. the

D. a

Câu 4: It was hot, _________ I turned on the conditioner.

A. however

B. but

C. because

D. so

Câu 5: The view is great, _______?

A. isn't it

B. was it

C. doesn't it

D. did it

Câu 6: Nowadays, most people rely ________ the mass media as their main source of information.

A. on

B. in

C. to

D. with