The team will movea speed of 15 kilometers per hour and have a short break every 2 hours.

问题补充：

The team will movea speed of 15 kilometers per hour, and have a short break every 2 hours. During the break they will tell stories English.

A. with ; by

B. at ; with

C. in ; at

D. at ; in

答案：

A. with ; by

B. at ; with

C. in ; at

(答案→)D. at ; in

解析：at a speed of 为固定词组，in English 为固定词组搭配。