A lot of attention to greenhouse gas emission. Look at those environmental posters.
A. is paying
B. is being paid
C. has paid
D. had been paid
网友回答
A. is paying
(答案→)B. is being paid
C. has paid
D. had been paid
解析：考查时态和语态。句意：—看看这些环保的海报。现在我们很注意温室气体的排放。使用现在进行时表示目前这段时间里一直发生的事情，根据句意使用被动语态的形式，故B正确。