Rescuers had to the search because of worsening weather conditions.A. call offB. take off

问题补充：

Rescuers had to the search because of worsening weather conditions.

A. call off

B. take off

C. come off

D. cut off

答案：

(答案→)A. call off

B. take off

C. come off

D. cut off

解析：句意，由于恶劣的天气状况，救助者不得不取消搜救。Call off 取消 take off 脱掉 come off 举行 cut off 切除，根据题意，故选A。