Mark the letter A, B, C or D on your answer sheet to indicate the option that best completes each of the following questions.

Câu hỏi

Songdo, ______, has 60,000 residents.

A. where is a smart city in South Korea

B. which a smart city in South Korea is

C. that there is a smart city in South Korea

D. which is a smart city in South Korea

E10- I-learn- Unit 7 (1)