——May I open the window to let some fresh air in? ——A. Hold onB. Go aheadC. Come onD. Take

问题补充：

——May I open the window to let some fresh air in? ——

A. Hold on

B. Go ahead

C. Come on

D. Take care

答案：

A. Hold on

(答案→)B. Go ahead

C. Come on

D. Take care

解析：考查交际用语：A. Hold on别挂断B. Go ahead 请便C. Come on加油 D. Take care保重，句意：--我可以打开窗户让新鲜空气进来吗？--请便。选B。