Mark the letter A, B, C, or D on your answer sheet to indicate the cor

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

The infrastructure of our city needs upgrading. It's in an extremely poor condition now.

• A. A. The infrastructure of our city needs upgrading, for it's in an extremely poor condition now.
• B. B. The infrastructure of our city needs upgrading though it's in an extremely poor condition now.
• C. C. While the infrastructure of our city needs upgrading, it's in an extremely poor condition now.
• D. D. The infrastructure of our city needs upgrading when it's in an extremely poor condition now.

2 câu có mối quan hệ nguyên nhân - kết quả => A
B, C là mối quan hệ đối lập
D là mối quan hệ thời gian, lần lượt