—Do you know when we can go back home? —Sorry I don’t. Because of the heavy snow storm h

问题补充：

—Do you know when we can go back home?

—Sorry, I don’t. Because of the heavy snow storm, highways have been blocked and flights have been .

A. put up

B. put off

C. taken off

D. taken up

答案：

A. put up

(答案→)B. put off

C. taken off

D. taken up

解析：句意：——你知道我们什么时候回家？——对不起，我不知道。因为暴风雪，高速公路已经被堵塞，航班已被推迟。A. put up 举起；B. put off 推迟，延误；C. taken off脱下，起飞；D. taken up占据。根据Because of the heavy snow storm,可知因为暴风雪航班被延误，推迟。故选B。