Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. They are not talking about global warming, but traffic congestion, ______
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
They are not talking about global warming, but traffic congestion, ________ ?
A. aren’t they
B. are they
C. do they
D. don’t they