After a long walk they have .A. given inB. given backC. given outD. given over

问题补充：

After a long walk, they have .

A. given in

B. given back

C. given out

D. given over

答案：

A. given in

B. given back

(答案→)C. given out

D. given over

解析：考查动词短语辨析。按照句意走了很长的一段路，他们已经精疲力竭啦。give out“用完；耗尽；精疲力竭”符合句意。