.The mail was for two days because of the snow storm.A. held outB. held offC. held upD. h

问题补充：

.

The mail was for two days because of the snow storm.

A. held out

B. held off

C. held up

D. held down

答案：

A. held out

B. held off

(答案→)C. held up

D. held down

解析：考查短语辨析。held out 伸出，held off 使保持距离，held up 使延误，held down 阻止，句意：邮件由于暴风雪延误了两天。所以选C。